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230154220 = 22519619929
BaseRepresentation
bin11011011011111…
…01111111101100
3121001002001020101
431231331333230
5432404413340
634501000444
75463164362
oct1555757754
9531061211
10230154220
11108a092aa
12650b3124
13388b453a
14227d1632
1515313c9a
hexdb7dfec

230154220 has 48 divisors (see below), whose sum is σ = 517154400. Its totient is φ = 85777920.

The previous prime is 230154203. The next prime is 230154229. The reversal of 230154220 is 22451032.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (230154229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18216 + ... + 28144.

It is an arithmetic number, because the mean of its divisors is an integer number (10774050).

Almost surely, 2230154220 is an apocalyptic number.

230154220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 230154220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258577200).

230154220 is an abundant number, since it is smaller than the sum of its proper divisors (287000180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

230154220 is a wasteful number, since it uses less digits than its factorization.

230154220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10018 (or 10016 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 230154220 is about 15170.8345189050. The cubic root of 230154220 is about 612.8294781555.

The spelling of 230154220 in words is "two hundred thirty million, one hundred fifty-four thousand, two hundred twenty".

Divisors: 1 2 4 5 10 19 20 38 61 76 95 122 190 244 305 380 610 1159 1220 2318 4636 5795 9929 11590 19858 23180 39716 49645 99290 188651 198580 377302 605669 754604 943255 1211338 1886510 2422676 3028345 3773020 6056690 11507711 12113380 23015422 46030844 57538555 115077110 230154220