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231300030 = 235133111907
BaseRepresentation
bin11011100100101…
…01101110111110
3121010020020222210
431302111232332
5433203100110
634541321250
75506006053
oct1562255676
9533206883
10231300030
11109621155
1265566226
1338bc5c30
1422a0d02a
151548d520
hexdc95bbe

231300030 has 64 divisors (see below), whose sum is σ = 600058368. Its totient is φ = 56722560.

The previous prime is 231299953. The next prime is 231300049. The reversal of 231300030 is 30003132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231299979 and 231300015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120337 + ... + 122243.

It is an arithmetic number, because the mean of its divisors is an integer number (9375912).

Almost surely, 2231300030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231300030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300029184).

231300030 is an abundant number, since it is smaller than the sum of its proper divisors (368758338).

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

231300030 is a wasteful number, since it uses less digits than its factorization.

231300030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 231300030 is about 15208.5512130512. The cubic root of 231300030 is about 613.8447743219.

Adding to 231300030 its reverse (30003132), we get a palindrome (261303162).

The spelling of 231300030 in words is "two hundred thirty-one million, three hundred thousand, thirty".

Divisors: 1 2 3 5 6 10 13 15 26 30 39 65 78 130 195 311 390 622 933 1555 1866 1907 3110 3814 4043 4665 5721 8086 9330 9535 11442 12129 19070 20215 24258 24791 28605 40430 49582 57210 60645 74373 121290 123955 148746 247910 371865 593077 743730 1186154 1779231 2965385 3558462 5930770 7710001 8896155 15420002 17792310 23130003 38550005 46260006 77100010 115650015 231300030