216914965 has 8 divisors (see below), whose sum is σ = 260987040. Its totient is φ = 173072592.

The previous prime is 216914959. The next prime is 216914987. The reversal of 216914965 is 569419612.

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

It is a cyclic number.

It is not a de Polignac number, because 216914965 - 2⁷ = 216914837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55339 + ... + 59128.

It is an arithmetic number, because the mean of its divisors is an integer number (32623380).

Almost surely, 2^216914965 is an apocalyptic number.

It is an amenable number.

216914965 is a deficient number, since it is larger than the sum of its proper divisors (44072075).

216914965 is a wasteful number, since it uses less digits than its factorization.

216914965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114851.

The product of its digits is 116640, while the sum is 43.

The square root of 216914965 is about 14728.0333038733. The cubic root of 216914965 is about 600.8459964043.

The spelling of 216914965 in words is "two hundred sixteen million, nine hundred fourteen thousand, nine hundred sixty-five".