231200331220 has 48 divisors (see below), whose sum is σ = 489024966528. Its totient is φ = 91813875840.

The previous prime is 231200331217. The next prime is 231200331233. The reversal of 231200331220 is 22133002132.

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, 3029977 + ... + 3105343.

It is an arithmetic number, because the mean of its divisors is an integer number (10188020136).

Almost surely, 2^231200331220 is an apocalyptic number.

231200331220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231200331220 is an abundant number, since it is smaller than the sum of its proper divisors (257824635308).

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

231200331220 is a wasteful number, since it uses less digits than its factorization.

231200331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76480 (or 76478 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 231200331220 its reverse (22133002132), we get a palindrome (253333333352).

The spelling of 231200331220 in words is "two hundred thirty-one billion, two hundred million, three hundred thirty-one thousand, two hundred twenty".