56540215297 has 2 divisors, whose sum is σ = 56540215298. Its totient is φ = 56540215296.

The previous prime is 56540215283. The next prime is 56540215343. The reversal of 56540215297 is 79251204565.

It is an a-pointer prime, because the next prime (56540215343) can be obtained adding 56540215297 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35737633936 + 20802581361 = 189044^2 + 144231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56540215297 is a prime.

It is a super-2 number, since 2×56540215297² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56540215217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270107648 + 28270107649.

It is an arithmetic number, because the mean of its divisors is an integer number (28270107649).

Almost surely, 2^56540215297 is an apocalyptic number.

It is an amenable number.

56540215297 is a deficient number, since it is larger than the sum of its proper divisors (1).

56540215297 is an equidigital number, since it uses as much as digits as its factorization.

56540215297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 56540215297 in words is "fifty-six billion, five hundred forty million, two hundred fifteen thousand, two hundred ninety-seven".