31859013811 has 2 divisors, whose sum is σ = 31859013812. Its totient is φ = 31859013810.

The previous prime is 31859013793. The next prime is 31859013827. The reversal of 31859013811 is 11831095813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31859013811 - 2⁹ = 31859013299 is a prime.

It is a super-2 number, since 2×31859013811² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31859013911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15929506905 + 15929506906.

It is an arithmetic number, because the mean of its divisors is an integer number (15929506906).

Almost surely, 2^31859013811 is an apocalyptic number.

31859013811 is a deficient number, since it is larger than the sum of its proper divisors (1).

31859013811 is an equidigital number, since it uses as much as digits as its factorization.

31859013811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 31859013811 in words is "thirty-one billion, eight hundred fifty-nine million, thirteen thousand, eight hundred eleven".