56525813 has 2 divisors, whose sum is σ = 56525814. Its totient is φ = 56525812.

The previous prime is 56525773. The next prime is 56525831. The reversal of 56525813 is 31852565.

Together with next prime (56525831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56220004 + 305809 = 7498^2 + 553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56525813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56525713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28262906 + 28262907.

It is an arithmetic number, because the mean of its divisors is an integer number (28262907).

Almost surely, 2^56525813 is an apocalyptic number.

It is an amenable number.

56525813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56525813 is an equidigital number, since it uses as much as digits as its factorization.

56525813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 35.

The square root of 56525813 is about 7518.3650483333. The cubic root of 56525813 is about 383.7799416420.

The spelling of 56525813 in words is "fifty-six million, five hundred twenty-five thousand, eight hundred thirteen".