31603520101957 has 2 divisors, whose sum is σ = 31603520101958. Its totient is φ = 31603520101956.

The previous prime is 31603520101667. The next prime is 31603520101991. The reversal of 31603520101957 is 75910102530613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19387474540641 + 12216045561316 = 4403121^2 + 3495146^2 .

It is a cyclic number.

It is not a de Polignac number, because 31603520101957 - 2¹¹ = 31603520099909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31603520101457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15801760050978 + 15801760050979.

It is an arithmetic number, because the mean of its divisors is an integer number (15801760050979).

Almost surely, 2^{31603520101957} is an apocalyptic number.

It is an amenable number.

31603520101957 is a deficient number, since it is larger than the sum of its proper divisors (1).

31603520101957 is an equidigital number, since it uses as much as digits as its factorization.

31603520101957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The spelling of 31603520101957 in words is "thirty-one trillion, six hundred three billion, five hundred twenty million, one hundred one thousand, nine hundred fifty-seven".