213831120 has 40 divisors (see below), whose sum is σ = 662877216. Its totient is φ = 57021568.

The previous prime is 213831119. The next prime is 213831139. The reversal of 213831120 is 21138312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445242 + ... + 445721.

Almost surely, 2^213831120 is an apocalyptic number.

213831120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213831120 is an abundant number, since it is smaller than the sum of its proper divisors (449046096).

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

213831120 is a wasteful number, since it uses less digits than its factorization.

213831120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890979 (or 890973 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 213831120 is about 14622.9654995148. The cubic root of 213831120 is about 597.9850184351.

Adding to 213831120 its reverse (21138312), we get a palindrome (234969432).

The spelling of 213831120 in words is "two hundred thirteen million, eight hundred thirty-one thousand, one hundred twenty".