56136557 has 2 divisors, whose sum is σ = 56136558. Its totient is φ = 56136556.

The previous prime is 56136551. The next prime is 56136581. The reversal of 56136557 is 75563165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 2758921 = 7306^2 + 1661^2 .

It is a cyclic number.

It is not a de Polignac number, because 56136557 - 2⁴ = 56136541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56136557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56136551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28068278 + 28068279.

It is an arithmetic number, because the mean of its divisors is an integer number (28068279).

Almost surely, 2^56136557 is an apocalyptic number.

It is an amenable number.

56136557 is a deficient number, since it is larger than the sum of its proper divisors (1).

56136557 is an equidigital number, since it uses as much as digits as its factorization.

56136557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 38.

The square root of 56136557 is about 7492.4333163532. The cubic root of 56136557 is about 382.8969652419.

The spelling of 56136557 in words is "fifty-six million, one hundred thirty-six thousand, five hundred fifty-seven".