56784531 has 16 divisors (see below), whose sum is σ = 76862720. Its totient is φ = 37285920.

The previous prime is 56784503. The next prime is 56784547. The reversal of 56784531 is 13548765.

It is not a de Polignac number, because 56784531 - 2⁵ = 56784499 is a prime.

It is a super-3 number, since 3×56784531³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56784531.

It is not an unprimeable number, because it can be changed into a prime (56784551) 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, 68586 + ... + 69408.

It is an arithmetic number, because the mean of its divisors is an integer number (4803920).

Almost surely, 2^56784531 is an apocalyptic number.

56784531 is a deficient number, since it is larger than the sum of its proper divisors (20078189).

56784531 is a wasteful number, since it uses less digits than its factorization.

56784531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its digits is 100800, while the sum is 39.

The square root of 56784531 is about 7535.5511410911. The cubic root of 56784531 is about 384.3645694043.

The spelling of 56784531 in words is "fifty-six million, seven hundred eighty-four thousand, five hundred thirty-one".