815451432 has 16 divisors (see below), whose sum is σ = 2038628640. Its totient is φ = 271817136.

The previous prime is 815451421. The next prime is 815451433. The reversal of 815451432 is 234154518.

It is a super-2 number, since 2×815451432² = 1329922075901701248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 815451393 and 815451402.

It is not an unprimeable number, because it can be changed into a prime (815451433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16988548 + ... + 16988595.

It is an arithmetic number, because the mean of its divisors is an integer number (127414290).

Almost surely, 2^815451432 is an apocalyptic number.

It is an amenable number.

815451432 is an abundant number, since it is smaller than the sum of its proper divisors (1223177208).

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

815451432 is a wasteful number, since it uses less digits than its factorization.

815451432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33977152 (or 33977148 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 815451432 is about 28556.1102393166. The cubic root of 815451432 is about 934.2562959489.

The spelling of 815451432 in words is "eight hundred fifteen million, four hundred fifty-one thousand, four hundred thirty-two".