816247212 has 24 divisors (see below), whose sum is σ = 2077720512. Its totient is φ = 247347600.

The previous prime is 816247183. The next prime is 816247219. The reversal of 816247212 is 212742618.

816247212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×816247212² = 1332519022195545888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (816247219) 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, 3091714 + ... + 3091977.

It is an arithmetic number, because the mean of its divisors is an integer number (86571688).

Almost surely, 2^816247212 is an apocalyptic number.

It is an amenable number.

816247212 is an abundant number, since it is smaller than the sum of its proper divisors (1261473300).

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

816247212 is a wasteful number, since it uses less digits than its factorization.

816247212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183709 (or 6183707 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 816247212 is about 28570.0404619944. The cubic root of 816247212 is about 934.5601034411.

The spelling of 816247212 in words is "eight hundred sixteen million, two hundred forty-seven thousand, two hundred twelve".