815251488 has 48 divisors (see below), whose sum is σ = 2197883520. Its totient is φ = 264404736.

The previous prime is 815251483. The next prime is 815251499. The reversal of 815251488 is 884152518.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (815251483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111208 + ... + 118311.

It is an arithmetic number, because the mean of its divisors is an integer number (45789240).

Almost surely, 2^815251488 is an apocalyptic number.

It is an amenable number.

815251488 is an abundant number, since it is smaller than the sum of its proper divisors (1382632032).

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

815251488 is a wasteful number, since it uses less digits than its factorization.

815251488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229569 (or 229561 counting only the distinct ones).

The product of its digits is 102400, while the sum is 42.

The square root of 815251488 is about 28552.6091277137. The cubic root of 815251488 is about 934.1799316175.

The spelling of 815251488 in words is "eight hundred fifteen million, two hundred fifty-one thousand, four hundred eighty-eight".