56951521 has 8 divisors (see below), whose sum is σ = 63301824. Its totient is φ = 50796720.

The previous prime is 56951483. The next prime is 56951527. The reversal of 56951521 is 12515965.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56951521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56951527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48261 + ... + 49426.

It is an arithmetic number, because the mean of its divisors is an integer number (7912728).

Almost surely, 2^56951521 is an apocalyptic number.

It is an amenable number.

56951521 is a deficient number, since it is larger than the sum of its proper divisors (6350303).

56951521 is a wasteful number, since it uses less digits than its factorization.

56951521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97751.

The product of its digits is 13500, while the sum is 34.

The square root of 56951521 is about 7546.6231521125. The cubic root of 56951521 is about 384.7409760488.

Subtracting from 56951521 its reverse (12515965), we obtain a square (44435556 = 6666²).

The spelling of 56951521 in words is "fifty-six million, nine hundred fifty-one thousand, five hundred twenty-one".