216315512 has 32 divisors (see below), whose sum is σ = 465755520. Its totient is φ = 92262240.

The previous prime is 216315511. The next prime is 216315521. The reversal of 216315512 is 215513612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216315511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2663 + ... + 20969.

It is an arithmetic number, because the mean of its divisors is an integer number (14554860).

Almost surely, 2^216315512 is an apocalyptic number.

It is an amenable number.

216315512 is an abundant number, since it is smaller than the sum of its proper divisors (249440008).

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

216315512 is a wasteful number, since it uses less digits than its factorization.

216315512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18531 (or 18527 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 216315512 is about 14707.6684760026. The cubic root of 216315512 is about 600.2919986124.

The spelling of 216315512 in words is "two hundred sixteen million, three hundred fifteen thousand, five hundred twelve".