31091541269 has 2 divisors, whose sum is σ = 31091541270. Its totient is φ = 31091541268.

The previous prime is 31091541263. The next prime is 31091541293. The reversal of 31091541269 is 96214519013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27803895025 + 3287646244 = 166745^2 + 57338^2 .

It is a cyclic number.

It is not a de Polignac number, because 31091541269 - 2⁴ = 31091541253 is a prime.

It is a super-2 number, since 2×31091541269² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31091541263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15545770634 + 15545770635.

It is an arithmetic number, because the mean of its divisors is an integer number (15545770635).

Almost surely, 2^31091541269 is an apocalyptic number.

It is an amenable number.

31091541269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31091541269 is an equidigital number, since it uses as much as digits as its factorization.

31091541269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 31091541269 in words is "thirty-one billion, ninety-one million, five hundred forty-one thousand, two hundred sixty-nine".