56239517 has 2 divisors, whose sum is σ = 56239518. Its totient is φ = 56239516.

The previous prime is 56239507. The next prime is 56239529. The reversal of 56239517 is 71593265.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49716601 + 6522916 = 7051^2 + 2554^2 .

It is a cyclic number.

It is not a de Polignac number, because 56239517 - 2⁴ = 56239501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56239507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28119758 + 28119759.

It is an arithmetic number, because the mean of its divisors is an integer number (28119759).

Almost surely, 2^56239517 is an apocalyptic number.

It is an amenable number.

56239517 is a deficient number, since it is larger than the sum of its proper divisors (1).

56239517 is an equidigital number, since it uses as much as digits as its factorization.

56239517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 56239517 is about 7499.3011007693. The cubic root of 56239517 is about 383.1309125794.

The spelling of 56239517 in words is "fifty-six million, two hundred thirty-nine thousand, five hundred seventeen".