216697320 has 96 divisors (see below), whose sum is σ = 804885120. Its totient is φ = 49530240.

The previous prime is 216697303. The next prime is 216697333. The reversal of 216697320 is 23796612.

216697320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40476 + ... + 45515.

It is an arithmetic number, because the mean of its divisors is an integer number (8384220).

Almost surely, 2^216697320 is an apocalyptic number.

216697320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216697320 is an abundant number, since it is smaller than the sum of its proper divisors (588187800).

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

216697320 is a wasteful number, since it uses less digits than its factorization.

216697320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86015 (or 86008 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 216697320 is about 14720.6426490150. The cubic root of 216697320 is about 600.6449731011.

The spelling of 216697320 in words is "two hundred sixteen million, six hundred ninety-seven thousand, three hundred twenty".