215057680313 has 4 divisors (see below), whose sum is σ = 245780206080. Its totient is φ = 184335154548.

The previous prime is 215057680309. The next prime is 215057680319. The reversal of 215057680313 is 313086750512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215057680313 - 2² = 215057680309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215057680319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15361262873 + ... + 15361262886.

It is an arithmetic number, because the mean of its divisors is an integer number (61445051520).

Almost surely, 2^215057680313 is an apocalyptic number.

It is an amenable number.

215057680313 is a deficient number, since it is larger than the sum of its proper divisors (30722525767).

215057680313 is an equidigital number, since it uses as much as digits as its factorization.

215057680313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30722525766.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 215057680313 in words is "two hundred fifteen billion, fifty-seven million, six hundred eighty thousand, three hundred thirteen".