231313651132 has 24 divisors (see below), whose sum is σ = 409751924400. Its totient is φ = 114244242816.

The previous prime is 231313651123. The next prime is 231313651133. The reversal of 231313651132 is 231156313132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231313651094 and 231313651103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231313651133) 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, 39919 + ... + 681337.

It is an arithmetic number, because the mean of its divisors is an integer number (17072996850).

Almost surely, 2^231313651132 is an apocalyptic number.

It is an amenable number.

231313651132 is a deficient number, since it is larger than the sum of its proper divisors (178438273268).

231313651132 is a wasteful number, since it uses less digits than its factorization.

231313651132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642525 (or 642523 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

Adding to 231313651132 its reverse (231156313132), we get a palindrome (462469964264).

The spelling of 231313651132 in words is "two hundred thirty-one billion, three hundred thirteen million, six hundred fifty-one thousand, one hundred thirty-two".