216158812 has 6 divisors (see below), whose sum is σ = 378277928. Its totient is φ = 108079404.

The previous prime is 216158759. The next prime is 216158819. The reversal of 216158812 is 218851612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216158819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27019848 + ... + 27019855.

Almost surely, 2^216158812 is an apocalyptic number.

It is an amenable number.

216158812 is a deficient number, since it is larger than the sum of its proper divisors (162119116).

216158812 is a wasteful number, since it uses less digits than its factorization.

216158812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54039707 (or 54039705 counting only the distinct ones).

The product of its digits is 7680, while the sum is 34.

The square root of 216158812 is about 14702.3403579158. The cubic root of 216158812 is about 600.1470121243.

The spelling of 216158812 in words is "two hundred sixteen million, one hundred fifty-eight thousand, eight hundred twelve".