231326324523 has 64 divisors (see below), whose sum is σ = 392851200000. Its totient is φ = 131786403840.

The previous prime is 231326324507. The next prime is 231326324527. The reversal of 231326324523 is 325423623132.

It is a happy number.

231326324523 is a `hidden beast` number, since 2 + 3 + 1 + 326 + 324 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 231326324523 - 2⁴ = 231326324507 is a prime.

It is a super-2 number, since 2×231326324523² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231326324527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 148953715 + ... + 148955267.

It is an arithmetic number, because the mean of its divisors is an integer number (6138300000).

Almost surely, 2^231326324523 is an apocalyptic number.

231326324523 is a deficient number, since it is larger than the sum of its proper divisors (161524875477).

231326324523 is a wasteful number, since it uses less digits than its factorization.

231326324523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449 (or 3443 counting only the distinct ones).

The product of its digits is 155520, while the sum is 36.

Adding to 231326324523 its reverse (325423623132), we get a palindrome (556749947655).

The spelling of 231326324523 in words is "two hundred thirty-one billion, three hundred twenty-six million, three hundred twenty-four thousand, five hundred twenty-three".