231301223131 has 8 divisors (see below), whose sum is σ = 252334508400. Its totient is φ = 210268921440.

The previous prime is 231301223123. The next prime is 231301223143. The reversal of 231301223131 is 131322103132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231301223131 - 2³ = 231301223123 is a prime.

It is a super-2 number, since 2×231301223131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231301223161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298165 + ... + 742633.

It is an arithmetic number, because the mean of its divisors is an integer number (31541813550).

Almost surely, 2^231301223131 is an apocalyptic number.

231301223131 is a deficient number, since it is larger than the sum of its proper divisors (21033285269).

231301223131 is a wasteful number, since it uses less digits than its factorization.

231301223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491789.

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

Adding to 231301223131 its reverse (131322103132), we get a palindrome (362623326263).

The spelling of 231301223131 in words is "two hundred thirty-one billion, three hundred one million, two hundred twenty-three thousand, one hundred thirty-one".