816312136 has 32 divisors (see below), whose sum is σ = 1599834240. Its totient is φ = 389749888.

The previous prime is 816312131. The next prime is 816312139. The reversal of 816312136 is 631213618.

It is a junction number, because it is equal to n+sod(n) for n = 816312098 and 816312107.

It is not an unprimeable number, because it can be changed into a prime (816312131) 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, 115620 + ... + 122476.

It is an arithmetic number, because the mean of its divisors is an integer number (49994820).

Almost surely, 2^816312136 is an apocalyptic number.

It is an amenable number.

816312136 is a deficient number, since it is larger than the sum of its proper divisors (783522104).

816312136 is a wasteful number, since it uses less digits than its factorization.

816312136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7533 (or 7529 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 816312136 is about 28571.1766646038. The cubic root of 816312136 is about 934.5848809720.

The spelling of 816312136 in words is "eight hundred sixteen million, three hundred twelve thousand, one hundred thirty-six".