216256020 has 48 divisors (see below), whose sum is σ = 606294528. Its totient is φ = 57594240.

The previous prime is 216256013. The next prime is 216256037. The reversal of 216256020 is 20652612.

216256020 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

216256020 is strictly pandigital in base 9.

It is a congruent number.

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, 57642 + ... + 61278.

It is an arithmetic number, because the mean of its divisors is an integer number (12631136).

Almost surely, 2^216256020 is an apocalyptic number.

216256020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216256020 is an abundant number, since it is smaller than the sum of its proper divisors (390038508).

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

216256020 is a wasteful number, since it uses less digits than its factorization.

216256020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 216256020 is about 14705.6458545689. The cubic root of 216256020 is about 600.2369619583.

The spelling of 216256020 in words is "two hundred sixteen million, two hundred fifty-six thousand, twenty".