216015868 has 6 divisors (see below), whose sum is σ = 378027776. Its totient is φ = 108007932.

The previous prime is 216015857. The next prime is 216015911. The reversal of 216015868 is 868510612.

216015868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27001980 + ... + 27001987.

Almost surely, 2^216015868 is an apocalyptic number.

It is an amenable number.

216015868 is a deficient number, since it is larger than the sum of its proper divisors (162011908).

216015868 is a wasteful number, since it uses less digits than its factorization.

216015868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54003971 (or 54003969 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 216015868 is about 14697.4782871076. The cubic root of 216015868 is about 600.0146922328.

The spelling of 216015868 in words is "two hundred sixteen million, fifteen thousand, eight hundred sixty-eight".