231131252437 has 2 divisors, whose sum is σ = 231131252438. Its totient is φ = 231131252436.

The previous prime is 231131252419. The next prime is 231131252453. The reversal of 231131252437 is 734252131132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131097581476 + 100033670961 = 362074^2 + 316281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231131252437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231131252467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115565626218 + 115565626219.

It is an arithmetic number, because the mean of its divisors is an integer number (115565626219).

Almost surely, 2^231131252437 is an apocalyptic number.

It is an amenable number.

231131252437 is a deficient number, since it is larger than the sum of its proper divisors (1).

231131252437 is an equidigital number, since it uses as much as digits as its factorization.

231131252437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

Adding to 231131252437 its reverse (734252131132), we get a palindrome (965383383569).

The spelling of 231131252437 in words is "two hundred thirty-one billion, one hundred thirty-one million, two hundred fifty-two thousand, four hundred thirty-seven".