216754506 has 24 divisors (see below), whose sum is σ = 479628864. Its totient is φ = 70713960.

The previous prime is 216754487. The next prime is 216754513. The reversal of 216754506 is 605457612.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127260 + ... + 128951.

It is an arithmetic number, because the mean of its divisors is an integer number (19984536).

Almost surely, 2^216754506 is an apocalyptic number.

216754506 is an abundant number, since it is smaller than the sum of its proper divisors (262874358).

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

216754506 is a wasteful number, since it uses less digits than its factorization.

216754506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256266 (or 256263 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 216754506 is about 14722.5848953232. The cubic root of 216754506 is about 600.6978047995.

The spelling of 216754506 in words is "two hundred sixteen million, seven hundred fifty-four thousand, five hundred six".