216592220155 has 16 divisors (see below), whose sum is σ = 260860538880. Its totient is φ = 172641073792.

The previous prime is 216592220153. The next prime is 216592220189. The reversal of 216592220155 is 551022295612.

It is a cyclic number.

It is not a de Polignac number, because 216592220155 - 2¹ = 216592220153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216592220153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3246342 + ... + 3312388.

It is an arithmetic number, because the mean of its divisors is an integer number (16303783680).

Almost surely, 2^216592220155 is an apocalyptic number.

216592220155 is a deficient number, since it is larger than the sum of its proper divisors (44268318725).

216592220155 is a wasteful number, since it uses less digits than its factorization.

216592220155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68438.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 216592220155 in words is "two hundred sixteen billion, five hundred ninety-two million, two hundred twenty thousand, one hundred fifty-five".