216863954 has 8 divisors (see below), whose sum is σ = 325535628. Its totient is φ = 108352080.

The previous prime is 216863939. The next prime is 216863963. The reversal of 216863954 is 459368612.

216863954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 200647225 + 16216729 = 14165^2 + 4027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 36497 + ... + 42020.

Almost surely, 2^216863954 is an apocalyptic number.

216863954 is a deficient number, since it is larger than the sum of its proper divisors (108671674).

216863954 is a wasteful number, since it uses less digits than its factorization.

216863954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79900.

The product of its digits is 311040, while the sum is 44.

The square root of 216863954 is about 14726.3014365454. The cubic root of 216863954 is about 600.7988932180.

The spelling of 216863954 in words is "two hundred sixteen million, eight hundred sixty-three thousand, nine hundred fifty-four".