216851128 has 32 divisors (see below), whose sum is σ = 444422160. Its totient is φ = 98588160.

The previous prime is 216851113. The next prime is 216851147. The reversal of 216851128 is 821158612.

It is a junction number, because it is equal to n+sod(n) for n = 216851093 and 216851102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8593 + ... + 22528.

Almost surely, 2^216851128 is an apocalyptic number.

It is an amenable number.

216851128 is an abundant number, since it is smaller than the sum of its proper divisors (227571032).

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

216851128 is a wasteful number, since it uses less digits than its factorization.

216851128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31207 (or 31203 counting only the distinct ones).

The product of its digits is 7680, while the sum is 34.

The square root of 216851128 is about 14725.8659507684. The cubic root of 216851128 is about 600.7870486208.

The spelling of 216851128 in words is "two hundred sixteen million, eight hundred fifty-one thousand, one hundred twenty-eight".