56621775 has 48 divisors (see below), whose sum is σ = 110707200. Its totient is φ = 24984960.

The previous prime is 56621771. The next prime is 56621797. The reversal of 56621775 is 57712665.

It is not a de Polignac number, because 56621775 - 2² = 56621771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56621771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13366 + ... + 17084.

It is an arithmetic number, because the mean of its divisors is an integer number (2306400).

Almost surely, 2^56621775 is an apocalyptic number.

56621775 is a deficient number, since it is larger than the sum of its proper divisors (54085425).

56621775 is a wasteful number, since it uses less digits than its factorization.

56621775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768 (or 3763 counting only the distinct ones).

The product of its digits is 88200, while the sum is 39.

The square root of 56621775 is about 7524.7441816981. The cubic root of 56621775 is about 383.9969956905.

The spelling of 56621775 in words is "fifty-six million, six hundred twenty-one thousand, seven hundred seventy-five".