231531501141320 has 16 divisors (see below), whose sum is σ = 520945877568060. Its totient is φ = 92612600456512.

The previous prime is 231531501141263. The next prime is 231531501141341. The reversal of 231531501141320 is 23141105135132.

It can be written as a sum of positive squares in 2 ways, for example, as 231530246989924 + 1254151396 = 15216118^2 + 35414^2 .

It is a super-2 number, since 2×231531501141320² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894143764227 + ... + 2894143764306.

Almost surely, 2^{231531501141320} is an apocalyptic number.

231531501141320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231531501141320 is an abundant number, since it is smaller than the sum of its proper divisors (289414376426740).

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

231531501141320 is a wasteful number, since it uses less digits than its factorization.

231531501141320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788287528544 (or 5788287528540 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 231531501141320 its reverse (23141105135132), we get a palindrome (254672606276452).

The spelling of 231531501141320 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, five hundred one million, one hundred forty-one thousand, three hundred twenty".