216155667 has 32 divisors (see below), whose sum is σ = 355880448. Its totient is φ = 113642496.

The previous prime is 216155657. The next prime is 216155713. The reversal of 216155667 is 766551612.

It is not a de Polignac number, because 216155667 - 2⁸ = 216155411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (216155627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95248 + ... + 97490.

It is an arithmetic number, because the mean of its divisors is an integer number (11121264).

Almost surely, 2^216155667 is an apocalyptic number.

216155667 is a deficient number, since it is larger than the sum of its proper divisors (139724781).

216155667 is a wasteful number, since it uses less digits than its factorization.

216155667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2619.

The product of its digits is 75600, while the sum is 39.

The square root of 216155667 is about 14702.2334017659. The cubic root of 216155667 is about 600.1441014996.

The spelling of 216155667 in words is "two hundred sixteen million, one hundred fifty-five thousand, six hundred sixty-seven".