213305994 has 32 divisors (see below), whose sum is σ = 517106880. Its totient is φ = 64638000.

The previous prime is 213305993. The next prime is 213306001. The reversal of 213305994 is 499503312.

It is a happy number.

213305994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (213305993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178957 + ... + 180144.

It is an arithmetic number, because the mean of its divisors is an integer number (16159590).

Almost surely, 2^213305994 is an apocalyptic number.

213305994 is an abundant number, since it is smaller than the sum of its proper divisors (303800886).

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

213305994 is a wasteful number, since it uses less digits than its factorization.

213305994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359123 (or 359117 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 213305994 is about 14604.9989387196. The cubic root of 213305994 is about 597.4951070717.

The spelling of 213305994 in words is "two hundred thirteen million, three hundred five thousand, nine hundred ninety-four".