56215297 has 2 divisors, whose sum is σ = 56215298. Its totient is φ = 56215296.

The previous prime is 56215279. The next prime is 56215301. The reversal of 56215297 is 79251265.

Together with previous prime (56215279) 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., 56190016 + 25281 = 7496^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 56215297 - 2²³ = 47826689 is a prime.

It is not a weakly prime, because it can be changed into another prime (56215217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28107648 + 28107649.

It is an arithmetic number, because the mean of its divisors is an integer number (28107649).

Almost surely, 2^56215297 is an apocalyptic number.

It is an amenable number.

56215297 is a deficient number, since it is larger than the sum of its proper divisors (1).

56215297 is an equidigital number, since it uses as much as digits as its factorization.

56215297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 56215297 is about 7497.6861097275. The cubic root of 56215297 is about 383.0759052133.

The spelling of 56215297 in words is "fifty-six million, two hundred fifteen thousand, two hundred ninety-seven".