56556651 has 16 divisors (see below), whose sum is σ = 77419008. Its totient is φ = 36708000.

The previous prime is 56556649. The next prime is 56556659. The reversal of 56556651 is 15665565.

It is not a de Polignac number, because 56556651 - 2¹ = 56556649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56556659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28801 + ... + 30701.

It is an arithmetic number, because the mean of its divisors is an integer number (4838688).

Almost surely, 2^56556651 is an apocalyptic number.

56556651 is a deficient number, since it is larger than the sum of its proper divisors (20862357).

56556651 is a wasteful number, since it uses less digits than its factorization.

56556651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162.

The product of its digits is 135000, while the sum is 39.

The square root of 56556651 is about 7520.4156135150. The cubic root of 56556651 is about 383.8497201122.

The spelling of 56556651 in words is "fifty-six million, five hundred fifty-six thousand, six hundred fifty-one".