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230624931 = 31034611619
BaseRepresentation
bin11011011111100…
…00111010100011
3121001221221221010
431233300322203
5433014444211
634515032003
75500164615
oct1557607243
9531857833
10230624931
111091aaa19
126529b603
1338a1a874
14228b4db5
15153a84a6
hexdbf0ea3

230624931 has 16 divisors (see below), whose sum is σ = 311351040. Its totient is φ = 151833120.

The previous prime is 230624929. The next prime is 230624981. The reversal of 230624931 is 139426032.

It is not a de Polignac number, because 230624931 - 21 = 230624929 is a prime.

It is a super-2 number, since 2×2306249312 = 106375717597509522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (230624981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141640 + ... + 143258.

It is an arithmetic number, because the mean of its divisors is an integer number (19459440).

Almost surely, 2230624931 is an apocalyptic number.

230624931 is a deficient number, since it is larger than the sum of its proper divisors (80726109).

230624931 is a wasteful number, since it uses less digits than its factorization.

230624931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 230624931 is about 15186.3402767092. The cubic root of 230624931 is about 613.2469795787.

The spelling of 230624931 in words is "two hundred thirty million, six hundred twenty-four thousand, nine hundred thirty-one".

Divisors: 1 3 103 309 461 1383 1619 4857 47483 142449 166757 500271 746359 2239077 76874977 230624931