816231232 has 14 divisors (see below), whose sum is σ = 1619708978. Its totient is φ = 408115584.

The previous prime is 816231173. The next prime is 816231257. The reversal of 816231232 is 232132618.

It can be written as a sum of positive squares in only one way, i.e., 810199296 + 6031936 = 28464^2 + 2456^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 816231232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6376743 + ... + 6376870.

Almost surely, 2^816231232 is an apocalyptic number.

It is an amenable number.

816231232 is a deficient number, since it is larger than the sum of its proper divisors (803477746).

816231232 is a wasteful number, since it uses less digits than its factorization.

816231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12753625 (or 12753615 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 816231232 is about 28569.7607970385. The cubic root of 816231232 is about 934.5540046483.

The spelling of 816231232 in words is "eight hundred sixteen million, two hundred thirty-one thousand, two hundred thirty-two".