231433044137 has 2 divisors, whose sum is σ = 231433044138. Its totient is φ = 231433044136.

The previous prime is 231433044103. The next prime is 231433044151. The reversal of 231433044137 is 731440334132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196726844521 + 34706199616 = 443539^2 + 186296^2 .

It is a cyclic number.

It is not a de Polignac number, because 231433044137 - 2²² = 231428849833 is a prime.

It is a super-2 number, since 2×231433044137² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231433044097 and 231433044106.

It is not a weakly prime, because it can be changed into another prime (231433046137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115716522068 + 115716522069.

It is an arithmetic number, because the mean of its divisors is an integer number (115716522069).

Almost surely, 2^231433044137 is an apocalyptic number.

It is an amenable number.

231433044137 is a deficient number, since it is larger than the sum of its proper divisors (1).

231433044137 is an equidigital number, since it uses as much as digits as its factorization.

231433044137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 35.

Adding to 231433044137 its reverse (731440334132), we get a palindrome (962873378269).

The spelling of 231433044137 in words is "two hundred thirty-one billion, four hundred thirty-three million, forty-four thousand, one hundred thirty-seven".