56531211 has 16 divisors (see below), whose sum is σ = 82416000. Its totient is φ = 34182720.

The previous prime is 56531207. The next prime is 56531219. The reversal of 56531211 is 11213565.

It is not a de Polignac number, because 56531211 - 2² = 56531207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56531219) 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, 14751 + ... + 18183.

It is an arithmetic number, because the mean of its divisors is an integer number (5151000).

Almost surely, 2^56531211 is an apocalyptic number.

56531211 is a deficient number, since it is larger than the sum of its proper divisors (25884789).

56531211 is a wasteful number, since it uses less digits than its factorization.

56531211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946.

The product of its digits is 900, while the sum is 24.

The square root of 56531211 is about 7518.7240273866. The cubic root of 56531211 is about 383.7921577610.

Adding to 56531211 its reverse (11213565), we get a palindrome (67744776).

The spelling of 56531211 in words is "fifty-six million, five hundred thirty-one thousand, two hundred eleven".