231264132220 has 36 divisors (see below), whose sum is σ = 533818783512. Its totient is φ = 84096047200.

The previous prime is 231264132217. The next prime is 231264132277. The reversal of 231264132220 is 22231462132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47779426 + ... + 47784265.

It is an arithmetic number, because the mean of its divisors is an integer number (14828299542).

Almost surely, 2^231264132220 is an apocalyptic number.

231264132220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231264132220 is an abundant number, since it is smaller than the sum of its proper divisors (302554651292).

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

231264132220 is a wasteful number, since it uses less digits than its factorization.

231264132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95563722 (or 95563709 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 231264132220 its reverse (22231462132), we get a palindrome (253495594352).

The spelling of 231264132220 in words is "two hundred thirty-one billion, two hundred sixty-four million, one hundred thirty-two thousand, two hundred twenty".