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56731018 = 223229432
BaseRepresentation
bin1101100001101…
…0010110001010
310221202020022211
43120122112022
5104010343033
65343535334
71256130361
oct330322612
9127666284
1056731018
112a028943
1216bba54a
13b9a4066
14776a7d8
154ea92cd
hex361a58a

56731018 has 36 divisors (see below), whose sum is σ = 94214610. Its totient is φ = 25587408.

The previous prime is 56730967. The next prime is 56731019. The reversal of 56731018 is 81013765.

It can be written as a sum of positive squares in only one way, i.e., 47927929 + 8803089 = 6923^2 + 2967^2 .

It is not an unprimeable number, because it can be changed into a prime (56731019) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1319305 + ... + 1319347.

Almost surely, 256731018 is an apocalyptic number.

56731018 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

56731018 is a deficient number, since it is larger than the sum of its proper divisors (37483592).

56731018 is a wasteful number, since it uses less digits than its factorization.

56731018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 56731018 is about 7531.9996016994. Note that the first 3 decimals coincide. The cubic root of 56731018 is about 384.2437914073.

The spelling of 56731018 in words is "fifty-six million, seven hundred thirty-one thousand, eighteen".

Divisors: 1 2 23 29 43 46 58 86 529 667 989 1058 1247 1334 1849 1978 2494 3698 15341 22747 28681 30682 42527 45494 53621 57362 85054 107242 659663 978121 1233283 1319326 1956242 2466566 28365509 56731018