213912720 has 120 divisors (see below), whose sum is σ = 821036736. Its totient is φ = 48893184.

The previous prime is 213912691. The next prime is 213912733. The reversal of 213912720 is 27219312.

213912720 is a `hidden beast` number, since 2 + 1 + 391 + 272 + 0 = 666.

213912720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

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, 16182 + ... + 26261.

Almost surely, 2^213912720 is an apocalyptic number.

213912720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213912720 is an abundant number, since it is smaller than the sum of its proper divisors (607124016).

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

213912720 is a wasteful number, since it uses less digits than its factorization.

213912720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42469 (or 42460 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 213912720 is about 14625.7553651085. The cubic root of 213912720 is about 598.0610743616.

The spelling of 213912720 in words is "two hundred thirteen million, nine hundred twelve thousand, seven hundred twenty".