213245394 has 16 divisors (see below), whose sum is σ = 434538432. Its totient is φ = 69740528.

The previous prime is 213245309. The next prime is 213245413. The reversal of 213245394 is 493542312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334974 + ... + 335609.

It is an arithmetic number, because the mean of its divisors is an integer number (27158652).

Almost surely, 2^213245394 is an apocalyptic number.

213245394 is an abundant number, since it is smaller than the sum of its proper divisors (221293038).

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

213245394 is a wasteful number, since it uses less digits than its factorization.

213245394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670641.

The product of its digits is 25920, while the sum is 33.

The square root of 213245394 is about 14602.9241592224. The cubic root of 213245394 is about 597.4385191434.

The spelling of 213245394 in words is "two hundred thirteen million, two hundred forty-five thousand, three hundred ninety-four".