231321310277 has 2 divisors, whose sum is σ = 231321310278. Its totient is φ = 231321310276.

The previous prime is 231321310273. The next prime is 231321310327. The reversal of 231321310277 is 772013123132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210615827041 + 20705483236 = 458929^2 + 143894^2 .

It is a cyclic number.

It is not a de Polignac number, because 231321310277 - 2² = 231321310273 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231321310271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115660655138 + 115660655139.

It is an arithmetic number, because the mean of its divisors is an integer number (115660655139).

Almost surely, 2^231321310277 is an apocalyptic number.

It is an amenable number.

231321310277 is a deficient number, since it is larger than the sum of its proper divisors (1).

231321310277 is an equidigital number, since it uses as much as digits as its factorization.

231321310277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The spelling of 231321310277 in words is "two hundred thirty-one billion, three hundred twenty-one million, three hundred ten thousand, two hundred seventy-seven".