131331000221957 has 2 divisors, whose sum is σ = 131331000221958. Its totient is φ = 131331000221956.

The previous prime is 131331000221951. The next prime is 131331000221989. The reversal of 131331000221957 is 759122000133131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110517933588001 + 20813066633956 = 10512751^2 + 4562134^2 .

It is a cyclic number.

It is not a de Polignac number, because 131331000221957 - 2³⁶ = 131262280745221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131331000221957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131331000221951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65665500110978 + 65665500110979.

It is an arithmetic number, because the mean of its divisors is an integer number (65665500110979).

Almost surely, 2^{131331000221957} is an apocalyptic number.

It is an amenable number.

131331000221957 is a deficient number, since it is larger than the sum of its proper divisors (1).

131331000221957 is an equidigital number, since it uses as much as digits as its factorization.

131331000221957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The spelling of 131331000221957 in words is "one hundred thirty-one trillion, three hundred thirty-one billion, two hundred twenty-one thousand, nine hundred fifty-seven".