816223132 has 12 divisors (see below), whose sum is σ = 1428726096. Its totient is φ = 408015680.

The previous prime is 816223081. The next prime is 816223139. The reversal of 816223132 is 231322618.

It is a self number, because there is not a number n which added to its sum of digits gives 816223132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816223139) 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, 2728 + ... + 40495.

It is an arithmetic number, because the mean of its divisors is an integer number (119060508).

Almost surely, 2^816223132 is an apocalyptic number.

It is an amenable number.

816223132 is a deficient number, since it is larger than the sum of its proper divisors (612502964).

816223132 is a wasteful number, since it uses less digits than its factorization.

816223132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47948 (or 47946 counting only the distinct ones).

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

The square root of 816223132 is about 28569.6190384121. The cubic root of 816223132 is about 934.5509132398.

The spelling of 816223132 in words is "eight hundred sixteen million, two hundred twenty-three thousand, one hundred thirty-two".