31103309172757 has 2 divisors, whose sum is σ = 31103309172758. Its totient is φ = 31103309172756.

The previous prime is 31103309172679. The next prime is 31103309172779. The reversal of 31103309172757 is 75727190330113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19332193191921 + 11771115980836 = 4396839^2 + 3430906^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31103309172757 is a prime.

It is a super-2 number, since 2×31103309172757² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31103309172757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103309142757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551654586378 + 15551654586379.

It is an arithmetic number, because the mean of its divisors is an integer number (15551654586379).

Almost surely, 2^{31103309172757} is an apocalyptic number.

It is an amenable number.

31103309172757 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103309172757 is an equidigital number, since it uses as much as digits as its factorization.

31103309172757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 833490, while the sum is 49.

The spelling of 31103309172757 in words is "thirty-one trillion, one hundred three billion, three hundred nine million, one hundred seventy-two thousand, seven hundred fifty-seven".