213431338 has 8 divisors (see below), whose sum is σ = 321365088. Its totient is φ = 106309644.

The previous prime is 213431321. The next prime is 213431359. The reversal of 213431338 is 833134312.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202356 + ... + 203407.

It is an arithmetic number, because the mean of its divisors is an integer number (40170636).

Almost surely, 2^213431338 is an apocalyptic number.

213431338 is a deficient number, since it is larger than the sum of its proper divisors (107933750).

213431338 is a wasteful number, since it uses less digits than its factorization.

213431338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406028.

The product of its digits is 5184, while the sum is 28.

The square root of 213431338 is about 14609.2894419955. The cubic root of 213431338 is about 597.6121185701.

The spelling of 213431338 in words is "two hundred thirteen million, four hundred thirty-one thousand, three hundred thirty-eight".