215253798979 has 8 divisors (see below), whose sum is σ = 218458226880. Its totient is φ = 212066834496.

The previous prime is 215253798919. The next prime is 215253799037. The reversal of 215253798979 is 979897352512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215253798979 - 2²⁷ = 215119581251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215253798919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341019 + ... + 4390324.

It is an arithmetic number, because the mean of its divisors is an integer number (27307278360).

Almost surely, 2^215253798979 is an apocalyptic number.

215253798979 is a deficient number, since it is larger than the sum of its proper divisors (3204427901).

215253798979 is an equidigital number, since it uses as much as digits as its factorization.

215253798979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731709.

The product of its digits is 85730400, while the sum is 67.

The spelling of 215253798979 in words is "two hundred fifteen billion, two hundred fifty-three million, seven hundred ninety-eight thousand, nine hundred seventy-nine".