815313212 has 24 divisors (see below), whose sum is σ = 1658267520. Its totient is φ = 343496880.

The previous prime is 815313211. The next prime is 815313229. The reversal of 815313212 is 212313518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815313211) 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, 245114 + ... + 248417.

It is an arithmetic number, because the mean of its divisors is an integer number (69094480).

Almost surely, 2^815313212 is an apocalyptic number.

It is an amenable number.

815313212 is an abundant number, since it is smaller than the sum of its proper divisors (842954308).

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

815313212 is a wasteful number, since it uses less digits than its factorization.

815313212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493601 (or 493599 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 815313212 is about 28553.6899892116. The cubic root of 815313212 is about 934.2035071104.

The spelling of 815313212 in words is "eight hundred fifteen million, three hundred thirteen thousand, two hundred twelve".