815551472 has 60 divisors (see below), whose sum is σ = 1732621248. Its totient is φ = 370214400.

The previous prime is 815551463. The next prime is 815551483. The reversal of 815551472 is 274155518.

It is a congruent number.

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, 2622197 + ... + 2622507.

Almost surely, 2^815551472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 815551472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866310624).

815551472 is an abundant number, since it is smaller than the sum of its proper divisors (917069776).

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

815551472 is a wasteful number, since it uses less digits than its factorization.

815551472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 361 counting only the distinct ones).

The product of its digits is 56000, while the sum is 38.

The square root of 815551472 is about 28557.8618247235. The cubic root of 815551472 is about 934.2944994006.

The spelling of 815551472 in words is "eight hundred fifteen million, five hundred fifty-one thousand, four hundred seventy-two".