816903522 has 64 divisors (see below), whose sum is σ = 1889256960. Its totient is φ = 261436032.

The previous prime is 816903509. The next prime is 816903587. The reversal of 816903522 is 225309618.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131478 + ... + 137550.

It is an arithmetic number, because the mean of its divisors is an integer number (29519640).

Almost surely, 2^816903522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816903522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944628480).

816903522 is an abundant number, since it is smaller than the sum of its proper divisors (1072353438).

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

816903522 is a wasteful number, since it uses less digits than its factorization.

816903522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6184 (or 6178 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 816903522 is about 28581.5241371065. The cubic root of 816903522 is about 934.8105164750.

The spelling of 816903522 in words is "eight hundred sixteen million, nine hundred three thousand, five hundred twenty-two".