215360044957 has 2 divisors, whose sum is σ = 215360044958. Its totient is φ = 215360044956.

The previous prime is 215360044951. The next prime is 215360045071. The reversal of 215360044957 is 759440063512.

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., 206125988121 + 9234056836 = 454011^2 + 96094^2 .

It is a cyclic number.

It is not a de Polignac number, because 215360044957 - 2⁷ = 215360044829 is a prime.

It is a super-2 number, since 2×215360044957² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215360044951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107680022478 + 107680022479.

It is an arithmetic number, because the mean of its divisors is an integer number (107680022479).

Almost surely, 2^215360044957 is an apocalyptic number.

It is an amenable number.

215360044957 is a deficient number, since it is larger than the sum of its proper divisors (1).

215360044957 is an equidigital number, since it uses as much as digits as its factorization.

215360044957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 215360044957 in words is "two hundred fifteen billion, three hundred sixty million, forty-four thousand, nine hundred fifty-seven".