213919904 has 24 divisors (see below), whose sum is σ = 459442368. Its totient is φ = 97236160.

The previous prime is 213919897. The next prime is 213919931. The reversal of 213919904 is 409919312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303512 + ... + 304215.

It is an arithmetic number, because the mean of its divisors is an integer number (19143432).

Almost surely, 2^213919904 is an apocalyptic number.

It is an amenable number.

213919904 is an abundant number, since it is smaller than the sum of its proper divisors (245522464).

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

213919904 is a wasteful number, since it uses less digits than its factorization.

213919904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607748 (or 607740 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 213919904 is about 14626.0009571995. Note that the first 3 decimals coincide. The cubic root of 213919904 is about 598.0677693393.

The spelling of 213919904 in words is "two hundred thirteen million, nine hundred nineteen thousand, nine hundred four".