213312438 has 24 divisors (see below), whose sum is σ = 462578376. Its totient is φ = 71042400.

The previous prime is 213312431. The next prime is 213312443. The reversal of 213312438 is 834213312.

213312438 is a `hidden beast` number, since 213 + 3 + 12 + 438 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213312431) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19293 + ... + 28263.

It is an arithmetic number, because the mean of its divisors is an integer number (19274099).

Almost surely, 2^213312438 is an apocalyptic number.

213312438 is an abundant number, since it is smaller than the sum of its proper divisors (249265938).

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

213312438 is a wasteful number, since it uses less digits than its factorization.

213312438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300 (or 10297 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 213312438 is about 14605.2195464498. The cubic root of 213312438 is about 597.5011238111.

The spelling of 213312438 in words is "two hundred thirteen million, three hundred twelve thousand, four hundred thirty-eight".