56531745 has 48 divisors (see below), whose sum is σ = 105992640. Its totient is φ = 27775872.

The previous prime is 56531737. The next prime is 56531747. The reversal of 56531745 is 54713565.

56531745 is a `hidden beast` number, since 56 + 531 + 74 + 5 = 666.

It is not a de Polignac number, because 56531745 - 2³ = 56531737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56531747) 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, 30742 + ... + 32528.

It is an arithmetic number, because the mean of its divisors is an integer number (2208180).

Almost surely, 2^56531745 is an apocalyptic number.

It is an amenable number.

56531745 is a deficient number, since it is larger than the sum of its proper divisors (49460895).

56531745 is a wasteful number, since it uses less digits than its factorization.

56531745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854 (or 1851 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 56531745 is about 7518.7595386473. The cubic root of 56531745 is about 383.7933662048.

The spelling of 56531745 in words is "fifty-six million, five hundred thirty-one thousand, seven hundred forty-five".