815225900 has 36 divisors (see below), whose sum is σ = 1770876240. Its totient is φ = 325752000.

The previous prime is 815225891. The next prime is 815225903. The reversal of 815225900 is 9522518.

It is not an unprimeable number, because it can be changed into a prime (815225903) 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, 107225 + ... + 114575.

Almost surely, 2^815225900 is an apocalyptic number.

It is an amenable number.

815225900 is an abundant number, since it is smaller than the sum of its proper divisors (955650340).

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

815225900 is a wasteful number, since it uses less digits than its factorization.

815225900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8474 (or 8467 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 815225900 is about 28552.1610390527. The cubic root of 815225900 is about 934.1701579274.

The spelling of 815225900 in words is "eight hundred fifteen million, two hundred twenty-five thousand, nine hundred".