Search a number
-
+
231056308 = 22719874153
BaseRepresentation
bin11011100010110…
…10001110110100
3121002202212200001
431301122032310
5433122300213
634532201044
75503642360
oct1561321664
9532685601
10231056308
1110947502a
1265469184
1338b3c012
14229882a0
15154411dd
hexdc5a3b4

231056308 has 24 divisors (see below), whose sum is σ = 462456512. Its totient is φ = 98950464.

The previous prime is 231056261. The next prime is 231056317. The reversal of 231056308 is 803650132.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53560 + ... + 57712.

Almost surely, 2231056308 is an apocalyptic number.

231056308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

231056308 is an abundant number, since it is smaller than the sum of its proper divisors (231400204).

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

231056308 is a wasteful number, since it uses less digits than its factorization.

231056308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151 (or 6149 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 231056308 is about 15200.5364379024. The cubic root of 231056308 is about 613.6290947789.

It can be divided in two parts, 23 and 1056308, that added together give a triangular number (1056331 = T1453).

The spelling of 231056308 in words is "two hundred thirty-one million, fifty-six thousand, three hundred eight".

Divisors: 1 2 4 7 14 28 1987 3974 4153 7948 8306 13909 16612 27818 29071 55636 58142 116284 8252011 16504022 33008044 57764077 115528154 231056308