215397793512 has 64 divisors (see below), whose sum is σ = 652720593600. Its totient is φ = 65272057920.

The previous prime is 215397793459. The next prime is 215397793543.

It is a happy number.

215397793512 is a `hidden beast` number, since 2 + 1 + 5 + 39 + 7 + 7 + 93 + 512 = 666.

215397793512 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45325443 + ... + 45330194.

It is an arithmetic number, because the mean of its divisors is an integer number (10198759275).

Almost surely, 2^215397793512 is an apocalyptic number.

215397793512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215397793512 is an abundant number, since it is smaller than the sum of its proper divisors (437322800088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215397793512 is a wasteful number, since it uses less digits than its factorization.

215397793512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90655663 (or 90655653 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 54.

The spelling of 215397793512 in words is "two hundred fifteen billion, three hundred ninety-seven million, seven hundred ninety-three thousand, five hundred twelve".