31130555525149 has 2 divisors, whose sum is σ = 31130555525150. Its totient is φ = 31130555525148.

The previous prime is 31130555525119. The next prime is 31130555525161. The reversal of 31130555525149 is 94152555503113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31130206508025 + 349017124 = 5579445^2 + 18682^2 .

It is a cyclic number.

It is not a de Polignac number, because 31130555525149 - 2⁹ = 31130555524637 is a prime.

It is a super-2 number, since 2×31130555525149² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31130555525119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565277762574 + 15565277762575.

It is an arithmetic number, because the mean of its divisors is an integer number (15565277762575).

Almost surely, 2^{31130555525149} is an apocalyptic number.

It is an amenable number.

31130555525149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130555525149 is an equidigital number, since it uses as much as digits as its factorization.

31130555525149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025000, while the sum is 49.

The spelling of 31130555525149 in words is "thirty-one trillion, one hundred thirty billion, five hundred fifty-five million, five hundred twenty-five thousand, one hundred forty-nine".