216165402 has 32 divisors (see below), whose sum is σ = 481152960. Its totient is φ = 71937360.

The previous prime is 216165401. The next prime is 216165437. The reversal of 216165402 is 204561612.

216165402 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 654 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (216165401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33952 + ... + 39812.

It is an arithmetic number, because the mean of its divisors is an integer number (15036030).

Almost surely, 2^216165402 is an apocalyptic number.

216165402 is an abundant number, since it is smaller than the sum of its proper divisors (264987558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216165402 is a wasteful number, since it uses less digits than its factorization.

216165402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6555 (or 6549 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 216165402 is about 14702.5644701868. The cubic root of 216165402 is about 600.1531109251.

The spelling of 216165402 in words is "two hundred sixteen million, one hundred sixty-five thousand, four hundred two".