815331272 has 16 divisors (see below), whose sum is σ = 1747138560. Its totient is φ = 349427664.

The previous prime is 815331247. The next prime is 815331323. The reversal of 815331272 is 272133518.

815331272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×815331272² = 1329530166202275968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7279688 + ... + 7279799.

It is an arithmetic number, because the mean of its divisors is an integer number (109196160).

Almost surely, 2^815331272 is an apocalyptic number.

It is an amenable number.

815331272 is an abundant number, since it is smaller than the sum of its proper divisors (931807288).

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

815331272 is a wasteful number, since it uses less digits than its factorization.

815331272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14559500 (or 14559496 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 815331272 is about 28554.0062338019. The cubic root of 815331272 is about 934.2104049056.

The spelling of 815331272 in words is "eight hundred fifteen million, three hundred thirty-one thousand, two hundred seventy-two".