231364220 has 48 divisors (see below), whose sum is σ = 518011200. Its totient is φ = 86498304.

The previous prime is 231364213. The next prime is 231364283. The reversal of 231364220 is 22463132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48377 + ... + 52943.

It is an arithmetic number, because the mean of its divisors is an integer number (10791900).

Almost surely, 2^231364220 is an apocalyptic number.

231364220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231364220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259005600).

231364220 is an abundant number, since it is smaller than the sum of its proper divisors (286646980).

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

231364220 is a wasteful number, since it uses less digits than its factorization.

231364220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4742 (or 4740 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 231364220 is about 15210.6613925891. The cubic root of 231364220 is about 613.9015534637.

The spelling of 231364220 in words is "two hundred thirty-one million, three hundred sixty-four thousand, two hundred twenty".