213443994 has 8 divisors (see below), whose sum is σ = 426888000. Its totient is φ = 71147996.

The previous prime is 213443987. The next prime is 213443999. The reversal of 213443994 is 499344312.

213443994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

213443994 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (213443999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17786994 + ... + 17787005.

It is an arithmetic number, because the mean of its divisors is an integer number (53361000).

Almost surely, 2^213443994 is an apocalyptic number.

213443994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

213443994 is a wasteful number, since it uses less digits than its factorization.

213443994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35574004.

The product of its digits is 93312, while the sum is 39.

The square root of 213443994 is about 14609.7225846352. The cubic root of 213443994 is about 597.6239306897.

The spelling of 213443994 in words is "two hundred thirteen million, four hundred forty-three thousand, nine hundred ninety-four".