815530212 has 36 divisors (see below), whose sum is σ = 2355976896. Its totient is φ = 233008560.

The previous prime is 815530187. The next prime is 815530241. The reversal of 815530212 is 212035518.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1617864 + ... + 1618367.

Almost surely, 2^815530212 is an apocalyptic number.

It is an amenable number.

815530212 is an abundant number, since it is smaller than the sum of its proper divisors (1540446684).

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

815530212 is a wasteful number, since it uses less digits than its factorization.

815530212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236248 (or 3236243 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 815530212 is about 28557.4895955509. The cubic root of 815530212 is about 934.2863808557.

The spelling of 815530212 in words is "eight hundred fifteen million, five hundred thirty thousand, two hundred twelve".