31152040243591 has 2 divisors, whose sum is σ = 31152040243592. Its totient is φ = 31152040243590.

The previous prime is 31152040243589. The next prime is 31152040243601. The reversal of 31152040243591 is 19534204025113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31152040243591 - 2¹ = 31152040243589 is a prime.

It is a super-2 number, since 2×31152040243591² (a number of 28 digits) contains 22 as substring.

Together with 31152040243589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31152040243091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15576020121795 + 15576020121796.

It is an arithmetic number, because the mean of its divisors is an integer number (15576020121796).

Almost surely, 2^{31152040243591} is an apocalyptic number.

31152040243591 is a deficient number, since it is larger than the sum of its proper divisors (1).

31152040243591 is an equidigital number, since it uses as much as digits as its factorization.

31152040243591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 31152040243591 in words is "thirty-one trillion, one hundred fifty-two billion, forty million, two hundred forty-three thousand, five hundred ninety-one".