231134023261 has 2 divisors, whose sum is σ = 231134023262. Its totient is φ = 231134023260.

The previous prime is 231134023259. The next prime is 231134023339. The reversal of 231134023261 is 162320431132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203496623236 + 27637400025 = 451106^2 + 166245^2 .

It is a cyclic number.

It is not a de Polignac number, because 231134023261 - 2¹ = 231134023259 is a prime.

Together with 231134023259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231134023231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115567011630 + 115567011631.

It is an arithmetic number, because the mean of its divisors is an integer number (115567011631).

Almost surely, 2^231134023261 is an apocalyptic number.

It is an amenable number.

231134023261 is a deficient number, since it is larger than the sum of its proper divisors (1).

231134023261 is an equidigital number, since it uses as much as digits as its factorization.

231134023261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 231134023261 its reverse (162320431132), we get a palindrome (393454454393).

The spelling of 231134023261 in words is "two hundred thirty-one billion, one hundred thirty-four million, twenty-three thousand, two hundred sixty-one".