231323144031 has 64 divisors (see below), whose sum is σ = 406629043200. Its totient is φ = 127164981888.

The previous prime is 231323144027. The next prime is 231323144047. The reversal of 231323144031 is 130441323132.

It is a happy number.

231323144031 is a `hidden beast` number, since 2 + 313 + 2 + 314 + 4 + 0 + 31 = 666.

It is not a de Polignac number, because 231323144031 - 2² = 231323144027 is a prime.

It is a super-2 number, since 2×231323144031² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 231323143986 and 231323144004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323144071) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1442056 + ... + 1594418.

It is an arithmetic number, because the mean of its divisors is an integer number (6353578800).

Almost surely, 2^231323144031 is an apocalyptic number.

231323144031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231323144031 is a deficient number, since it is larger than the sum of its proper divisors (175305899169).

231323144031 is a wasteful number, since it uses less digits than its factorization.

231323144031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152685 (or 152679 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 231323144031 its reverse (130441323132), we get a palindrome (361764467163).

The spelling of 231323144031 in words is "two hundred thirty-one billion, three hundred twenty-three million, one hundred forty-four thousand, thirty-one".