231321310132 has 12 divisors (see below), whose sum is σ = 441613410336. Its totient is φ = 105146050040.

The previous prime is 231321310127. The next prime is 231321310139. The reversal of 231321310132 is 231013123132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321310139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2628651208 + ... + 2628651295.

It is an arithmetic number, because the mean of its divisors is an integer number (36801117528).

Almost surely, 2^231321310132 is an apocalyptic number.

231321310132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231321310132 is a deficient number, since it is larger than the sum of its proper divisors (210292100204).

231321310132 is a wasteful number, since it uses less digits than its factorization.

231321310132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257302518 (or 5257302516 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 231321310132 its reverse (231013123132), we get a palindrome (462334433264).

The spelling of 231321310132 in words is "two hundred thirty-one billion, three hundred twenty-one million, three hundred ten thousand, one hundred thirty-two".