216561002 has 32 divisors (see below), whose sum is σ = 377395200. Its totient is φ = 91288368.

The previous prime is 216560999. The next prime is 216561013. The reversal of 216561002 is 200165612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257699 + ... + 258537.

It is an arithmetic number, because the mean of its divisors is an integer number (11793600).

Almost surely, 2^216561002 is an apocalyptic number.

216561002 is a deficient number, since it is larger than the sum of its proper divisors (160834198).

216561002 is a wasteful number, since it uses less digits than its factorization.

216561002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 216561002 is about 14716.0117559072. The cubic root of 216561002 is about 600.5189972366.

The spelling of 216561002 in words is "two hundred sixteen million, five hundred sixty-one thousand, two".