231320131302 has 64 divisors (see below), whose sum is σ = 515150544384. Its totient is φ = 68790370560.

The previous prime is 231320131267. The next prime is 231320131313. The reversal of 231320131302 is 203131023132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4183 + ... + 680189.

It is an arithmetic number, because the mean of its divisors is an integer number (8049227256).

Almost surely, 2^231320131302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231320131302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257575272192).

231320131302 is an abundant number, since it is smaller than the sum of its proper divisors (283830413082).

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

231320131302 is a wasteful number, since it uses less digits than its factorization.

231320131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676173.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 231320131302 its reverse (203131023132), we get a palindrome (434451154434).

The spelling of 231320131302 in words is "two hundred thirty-one billion, three hundred twenty million, one hundred thirty-one thousand, three hundred two".