216353400 has 48 divisors (see below), whose sum is σ = 670697400. Its totient is φ = 57694080.

The previous prime is 216353381. The next prime is 216353411. The reversal of 216353400 is 4353612.

It is a happy number.

216353400 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 (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179695 + ... + 180894.

Almost surely, 2^216353400 is an apocalyptic number.

216353400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216353400 is an abundant number, since it is smaller than the sum of its proper divisors (454344000).

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

216353400 is a wasteful number, since it uses less digits than its factorization.

216353400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360608 (or 360599 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 216353400 is about 14708.9564551670. The cubic root of 216353400 is about 600.3270439269.

The spelling of 216353400 in words is "two hundred sixteen million, three hundred fifty-three thousand, four hundred".