216506502 has 12 divisors (see below), whose sum is σ = 469097460. Its totient is φ = 72168828.

The previous prime is 216506483. The next prime is 216506513. The reversal of 216506502 is 205605612.

216506502 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 0 + 650 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6014052 + ... + 6014087.

It is an arithmetic number, because the mean of its divisors is an integer number (39091455).

Almost surely, 2^216506502 is an apocalyptic number.

216506502 is an abundant number, since it is smaller than the sum of its proper divisors (252590958).

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

216506502 is a wasteful number, since it uses less digits than its factorization.

216506502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12028147 (or 12028144 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 216506502 is about 14714.1599148575. The cubic root of 216506502 is about 600.4686172345.

The spelling of 216506502 in words is "two hundred sixteen million, five hundred six thousand, five hundred two".