31911522079 has 2 divisors, whose sum is σ = 31911522080. Its totient is φ = 31911522078.

The previous prime is 31911522037. The next prime is 31911522113. The reversal of 31911522079 is 97022511913.

It is a strong prime.

It is an emirp because it is prime and its reverse (97022511913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31911522079 - 2⁹ = 31911521567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31911522679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15955761039 + 15955761040.

It is an arithmetic number, because the mean of its divisors is an integer number (15955761040).

Almost surely, 2^31911522079 is an apocalyptic number.

31911522079 is a deficient number, since it is larger than the sum of its proper divisors (1).

31911522079 is an equidigital number, since it uses as much as digits as its factorization.

31911522079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 31911522079 in words is "thirty-one billion, nine hundred eleven million, five hundred twenty-two thousand, seventy-nine".