31231130871169 has 2 divisors, whose sum is σ = 31231130871170. Its totient is φ = 31231130871168.

The previous prime is 31231130871131. The next prime is 31231130871179. The reversal of 31231130871169 is 96117803113213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22446635132944 + 8784495738225 = 4737788^2 + 2963865^2 .

It is a cyclic number.

It is not a de Polignac number, because 31231130871169 - 2⁷ = 31231130871041 is a prime.

It is a super-2 number, since 2×31231130871169² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31231130871119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615565435584 + 15615565435585.

It is an arithmetic number, because the mean of its divisors is an integer number (15615565435585).

Almost surely, 2^{31231130871169} is an apocalyptic number.

It is an amenable number.

31231130871169 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231130871169 is an equidigital number, since it uses as much as digits as its factorization.

31231130871169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 31231130871169 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty million, eight hundred seventy-one thousand, one hundred sixty-nine".