231807012605657 has 2 divisors, whose sum is σ = 231807012605658. Its totient is φ = 231807012605656.

The previous prime is 231807012605617. The next prime is 231807012605681. The reversal of 231807012605657 is 756506210708132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230566337416921 + 1240675188736 = 15184411^2 + 1113856^2 .

It is a cyclic number.

It is not a de Polignac number, because 231807012605657 - 2¹² = 231807012601561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231807012605599 and 231807012605608.

It is not a weakly prime, because it can be changed into another prime (231807012605617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115903506302828 + 115903506302829.

It is an arithmetic number, because the mean of its divisors is an integer number (115903506302829).

Almost surely, 2^{231807012605657} is an apocalyptic number.

It is an amenable number.

231807012605657 is a deficient number, since it is larger than the sum of its proper divisors (1).

231807012605657 is an equidigital number, since it uses as much as digits as its factorization.

231807012605657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 231807012605657 in words is "two hundred thirty-one trillion, eight hundred seven billion, twelve million, six hundred five thousand, six hundred fifty-seven".