56115217 has 2 divisors, whose sum is σ = 56115218. Its totient is φ = 56115216.

The previous prime is 56115197. The next prime is 56115251. The reversal of 56115217 is 71251165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55935441 + 179776 = 7479^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 56115217 - 2¹⁹ = 55590929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56115617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28057608 + 28057609.

It is an arithmetic number, because the mean of its divisors is an integer number (28057609).

Almost surely, 2^56115217 is an apocalyptic number.

It is an amenable number.

56115217 is a deficient number, since it is larger than the sum of its proper divisors (1).

56115217 is an equidigital number, since it uses as much as digits as its factorization.

56115217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 28.

The square root of 56115217 is about 7491.0090775542. The cubic root of 56115217 is about 382.8484403752.

The spelling of 56115217 in words is "fifty-six million, one hundred fifteen thousand, two hundred seventeen".