216863996 has 12 divisors (see below), whose sum is σ = 381185448. Its totient is φ = 107953872.

The previous prime is 216863981. The next prime is 216864023. The reversal of 216863996 is 699368612.

It is a super-2 number, since 2×216863996² = 94059985522176032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118511 + ... + 120326.

It is an arithmetic number, because the mean of its divisors is an integer number (31765454).

Almost surely, 2^216863996 is an apocalyptic number.

It is an amenable number.

216863996 is a deficient number, since it is larger than the sum of its proper divisors (164321452).

216863996 is a wasteful number, since it uses less digits than its factorization.

216863996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239068 (or 239066 counting only the distinct ones).

The product of its digits is 839808, while the sum is 50.

The square root of 216863996 is about 14726.3028625653. The cubic root of 216863996 is about 600.7989320035.

The spelling of 216863996 in words is "two hundred sixteen million, eight hundred sixty-three thousand, nine hundred ninety-six".