31042188169 has 2 divisors, whose sum is σ = 31042188170. Its totient is φ = 31042188168.

The previous prime is 31042188167. The next prime is 31042188187. The reversal of 31042188169 is 96188124013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16825202944 + 14216985225 = 129712^2 + 119235^2 .

It is a cyclic number.

It is not a de Polignac number, because 31042188169 - 2¹ = 31042188167 is a prime.

It is a super-2 number, since 2×31042188169² (a number of 22 digits) contains 22 as substring.

Together with 31042188167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31042188167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521094084 + 15521094085.

It is an arithmetic number, because the mean of its divisors is an integer number (15521094085).

Almost surely, 2^31042188169 is an apocalyptic number.

It is an amenable number.

31042188169 is a deficient number, since it is larger than the sum of its proper divisors (1).

31042188169 is an equidigital number, since it uses as much as digits as its factorization.

31042188169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 31042188169 in words is "thirty-one billion, forty-two million, one hundred eighty-eight thousand, one hundred sixty-nine".