815681324 has 12 divisors (see below), whose sum is σ = 1502571000. Its totient is φ = 386375328.

The previous prime is 815681323. The next prime is 815681327. The reversal of 815681324 is 423186518.

815681324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (815681323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5366249 + ... + 5366400.

It is an arithmetic number, because the mean of its divisors is an integer number (125214250).

Almost surely, 2^815681324 is an apocalyptic number.

It is an amenable number.

815681324 is a deficient number, since it is larger than the sum of its proper divisors (686889676).

815681324 is a wasteful number, since it uses less digits than its factorization.

815681324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10732672 (or 10732670 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 815681324 is about 28560.1352237695. The cubic root of 815681324 is about 934.3440828523.

The spelling of 815681324 in words is "eight hundred fifteen million, six hundred eighty-one thousand, three hundred twenty-four".