231531421254097 has 2 divisors, whose sum is σ = 231531421254098. Its totient is φ = 231531421254096.

The previous prime is 231531421254047. The next prime is 231531421254149. The reversal of 231531421254097 is 790452124135132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218482572696336 + 13048848557761 = 14781156^2 + 3612319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231531421254097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231531421254097.

It is not a weakly prime, because it can be changed into another prime (231531421254017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115765710627048 + 115765710627049.

It is an arithmetic number, because the mean of its divisors is an integer number (115765710627049).

Almost surely, 2^{231531421254097} is an apocalyptic number.

It is an amenable number.

231531421254097 is a deficient number, since it is larger than the sum of its proper divisors (1).

231531421254097 is an equidigital number, since it uses as much as digits as its factorization.

231531421254097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 231531421254097 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, four hundred twenty-one million, two hundred fifty-four thousand, ninety-seven".