56513437 has 2 divisors, whose sum is σ = 56513438. Its totient is φ = 56513436.

The previous prime is 56513417. The next prime is 56513453. The reversal of 56513437 is 73431565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48594841 + 7918596 = 6971^2 + 2814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56513437 is a prime.

It is a super-3 number, since 3×56513437³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56513407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28256718 + 28256719.

It is an arithmetic number, because the mean of its divisors is an integer number (28256719).

Almost surely, 2^56513437 is an apocalyptic number.

It is an amenable number.

56513437 is a deficient number, since it is larger than the sum of its proper divisors (1).

56513437 is an equidigital number, since it uses as much as digits as its factorization.

56513437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 34.

The square root of 56513437 is about 7517.5419519947. The cubic root of 56513437 is about 383.7519307977.

The spelling of 56513437 in words is "fifty-six million, five hundred thirteen thousand, four hundred thirty-seven".