56115013 has 2 divisors, whose sum is σ = 56115014. Its totient is φ = 56115012.

The previous prime is 56115001. The next prime is 56115047. The reversal of 56115013 is 31051165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55980324 + 134689 = 7482^2 + 367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56115013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56115083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28057506 + 28057507.

It is an arithmetic number, because the mean of its divisors is an integer number (28057507).

Almost surely, 2^56115013 is an apocalyptic number.

It is an amenable number.

56115013 is a deficient number, since it is larger than the sum of its proper divisors (1).

56115013 is an equidigital number, since it uses as much as digits as its factorization.

56115013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 56115013 is about 7490.9954612188. The cubic root of 56115013 is about 382.8479764417.

Adding to 56115013 its reverse (31051165), we get a palindrome (87166178).

It can be divided in two parts, 5611501 and 3, that multiplied together give a triangular number (16834503 = T₅₈₀₂).

The spelling of 56115013 in words is "fifty-six million, one hundred fifteen thousand, thirteen".