56312131 has 2 divisors, whose sum is σ = 56312132. Its totient is φ = 56312130.

The previous prime is 56312077. The next prime is 56312141. The reversal of 56312131 is 13121365.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56312131 - 2¹⁹ = 55787843 is a prime.

It is a super-2 number, since 2×56312131² = 6342112195522322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56312141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28156065 + 28156066.

It is an arithmetic number, because the mean of its divisors is an integer number (28156066).

Almost surely, 2^56312131 is an apocalyptic number.

56312131 is a deficient number, since it is larger than the sum of its proper divisors (1).

56312131 is an equidigital number, since it uses as much as digits as its factorization.

56312131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 56312131 is about 7504.1409235168. The cubic root of 56312131 is about 383.2957356110.

Adding to 56312131 its reverse (13121365), we get a palindrome (69433496).

It can be divided in two parts, 5 and 6312131, that added together give a palindrome (6312136).

The spelling of 56312131 in words is "fifty-six million, three hundred twelve thousand, one hundred thirty-one".