213999164 has 24 divisors (see below), whose sum is σ = 379579200. Its totient is φ = 105558336.

The previous prime is 213999161. The next prime is 213999173. The reversal of 213999164 is 461999312.

It is a happy number.

213999164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213999161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92429 + ... + 94715.

It is an arithmetic number, because the mean of its divisors is an integer number (15815800).

Almost surely, 2^213999164 is an apocalyptic number.

It is an amenable number.

213999164 is a deficient number, since it is larger than the sum of its proper divisors (165580036).

213999164 is a wasteful number, since it uses less digits than its factorization.

213999164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597 (or 2595 counting only the distinct ones).

The product of its digits is 104976, while the sum is 44.

The square root of 213999164 is about 14628.7102644081. The cubic root of 213999164 is about 598.1416240816.

The spelling of 213999164 in words is "two hundred thirteen million, nine hundred ninety-nine thousand, one hundred sixty-four".