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56503921 = 371527133
BaseRepresentation
bin1101011110001…
…0111001110001
310221022200210211
43113202321301
5103431111141
65335024121
71254163315
oct327427161
9127280724
1056503921
1129993261
1216b0b041
13b924896
14770bb45
154e61d81
hex35e2e71

56503921 has 4 divisors (see below), whose sum is σ = 58031092. Its totient is φ = 54976752.

The previous prime is 56503897. The next prime is 56503927. The reversal of 56503921 is 12930565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34751025 + 21752896 = 5895^2 + 4664^2 .

It is a cyclic number.

It is not a de Polignac number, because 56503921 - 219 = 55979633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56503927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763530 + ... + 763603.

It is an arithmetic number, because the mean of its divisors is an integer number (14507773).

Almost surely, 256503921 is an apocalyptic number.

It is an amenable number.

56503921 is a deficient number, since it is larger than the sum of its proper divisors (1527171).

56503921 is a wasteful number, since it uses less digits than its factorization.

56503921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527170.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 56503921 is about 7516.9090057017. The cubic root of 56503921 is about 383.7303902665.

The spelling of 56503921 in words is "fifty-six million, five hundred three thousand, nine hundred twenty-one".

Divisors: 1 37 1527133 56503921