56205131 has 2 divisors, whose sum is σ = 56205132. Its totient is φ = 56205130.

The previous prime is 56205119. The next prime is 56205151. The reversal of 56205131 is 13150265.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56205131 - 2¹⁰ = 56204107 is a prime.

It is a super-2 number, since 2×56205131² = 6318033501454322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56205097 and 56205106.

It is not a weakly prime, because it can be changed into another prime (56205101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28102565 + 28102566.

It is an arithmetic number, because the mean of its divisors is an integer number (28102566).

Almost surely, 2^56205131 is an apocalyptic number.

56205131 is a deficient number, since it is larger than the sum of its proper divisors (1).

56205131 is an equidigital number, since it uses as much as digits as its factorization.

56205131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 56205131 is about 7497.0081365836. The cubic root of 56205131 is about 383.0528119472.

Adding to 56205131 its reverse (13150265), we get a palindrome (69355396).

The spelling of 56205131 in words is "fifty-six million, two hundred five thousand, one hundred thirty-one".