231312411144521 has 48 divisors (see below), whose sum is σ = 285031528277760. Its totient is φ = 186647526404640.

The previous prime is 231312411144497. The next prime is 231312411144533. The reversal of 231312411144521 is 125441114213132.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-231312411144521 is a prime.

It is a super-2 number, since 2×231312411144521² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231312411140521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109482866 + ... + 111575636.

It is an arithmetic number, because the mean of its divisors is an integer number (5938156839120).

Almost surely, 2^{231312411144521} is an apocalyptic number.

It is an amenable number.

231312411144521 is a deficient number, since it is larger than the sum of its proper divisors (53719117133239).

231312411144521 is a wasteful number, since it uses less digits than its factorization.

231312411144521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093554 (or 2093547 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

Adding to 231312411144521 its reverse (125441114213132), we get a palindrome (356753525357653).

The spelling of 231312411144521 in words is "two hundred thirty-one trillion, three hundred twelve billion, four hundred eleven million, one hundred forty-four thousand, five hundred twenty-one".