56521773 has 64 divisors (see below), whose sum is σ = 107888640. Its totient is φ = 28382400.

The previous prime is 56521769. The next prime is 56521781. The reversal of 56521773 is 37712565.

56521773 is a `hidden beast` number, since 565 + 21 + 7 + 73 = 666.

It is not a de Polignac number, because 56521773 - 2² = 56521769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56521723) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64011 + ... + 64887.

It is an arithmetic number, because the mean of its divisors is an integer number (1685760).

Almost surely, 2^56521773 is an apocalyptic number.

It is an amenable number.

56521773 is a deficient number, since it is larger than the sum of its proper divisors (51366867).

56521773 is a wasteful number, since it uses less digits than its factorization.

56521773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 929 counting only the distinct ones).

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

The square root of 56521773 is about 7518.0963680974. The cubic root of 56521773 is about 383.7707982800.

The spelling of 56521773 in words is "fifty-six million, five hundred twenty-one thousand, seven hundred seventy-three".