216022920 has 32 divisors (see below), whose sum is σ = 648069120. Its totient is φ = 57606080.

The previous prime is 216022903. The next prime is 216022979. The reversal of 216022920 is 29220612.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 7 ways as a sum of consecutive naturals, for example, 899976 + ... + 900215.

It is an arithmetic number, because the mean of its divisors is an integer number (20252160).

Almost surely, 2^216022920 is an apocalyptic number.

216022920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216022920 is an abundant number, since it is smaller than the sum of its proper divisors (432046200).

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

216022920 is a wasteful number, since it uses less digits than its factorization.

216022920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800205 (or 1800201 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 216022920 is about 14697.7181902498. The cubic root of 216022920 is about 600.0212214716.

The spelling of 216022920 in words is "two hundred sixteen million, twenty-two thousand, nine hundred twenty".