56775321 has 6 divisors (see below), whose sum is σ = 82008810. Its totient is φ = 37850208.

The previous prime is 56775319. The next prime is 56775347. The reversal of 56775321 is 12357765.

56775321 is a `hidden beast` number, since 56 + 77 + 532 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35569296 + 21206025 = 5964^2 + 4605^2 .

It is not a de Polignac number, because 56775321 - 2¹ = 56775319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56775371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3154176 + ... + 3154193.

It is an arithmetic number, because the mean of its divisors is an integer number (13668135).

Almost surely, 2^56775321 is an apocalyptic number.

It is an amenable number.

56775321 is a deficient number, since it is larger than the sum of its proper divisors (25233489).

56775321 is a wasteful number, since it uses less digits than its factorization.

56775321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308375 (or 6308372 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 56775321 is about 7534.9400130326. The cubic root of 56775321 is about 384.3437879871.

The spelling of 56775321 in words is "fifty-six million, seven hundred seventy-five thousand, three hundred twenty-one".