815229312012 has 36 divisors (see below), whose sum is σ = 2060763266016. Its totient is φ = 271737205920.

The previous prime is 815229311977. The next prime is 815229312019. The reversal of 815229312012 is 210213922518.

815229312012 is a `hidden beast` number, since 8 + 1 + 522 + 9 + 3 + 120 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (815229312019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1632573 + ... + 2072619.

It is an arithmetic number, because the mean of its divisors is an integer number (57243424056).

Almost surely, 2^815229312012 is an apocalyptic number.

It is an amenable number.

815229312012 is an abundant number, since it is smaller than the sum of its proper divisors (1245533954004).

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

815229312012 is a wasteful number, since it uses less digits than its factorization.

815229312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491518 (or 491513 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 815229312012 in words is "eight hundred fifteen billion, two hundred twenty-nine million, three hundred twelve thousand, twelve".