213330138 has 64 divisors (see below), whose sum is σ = 525296640. Its totient is φ = 56391552.

The previous prime is 213330109. The next prime is 213330149. The reversal of 213330138 is 831033312.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31206 + ... + 37422.

It is an arithmetic number, because the mean of its divisors is an integer number (8207760).

Almost surely, 2^213330138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213330138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262648320).

213330138 is an abundant number, since it is smaller than the sum of its proper divisors (311966502).

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

213330138 is a wasteful number, since it uses less digits than its factorization.

213330138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 213330138 is about 14605.8254816357. The cubic root of 213330138 is about 597.5176496132.

The spelling of 213330138 in words is "two hundred thirteen million, three hundred thirty thousand, one hundred thirty-eight".