31391054011 has 2 divisors, whose sum is σ = 31391054012. Its totient is φ = 31391054010.

The previous prime is 31391053957. The next prime is 31391054039. The reversal of 31391054011 is 11045019313.

It is an a-pointer prime, because the next prime (31391054039) can be obtained adding 31391054011 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31391054011 - 2¹¹ = 31391051963 is a prime.

It is not a weakly prime, because it can be changed into another prime (31391054711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15695527005 + 15695527006.

It is an arithmetic number, because the mean of its divisors is an integer number (15695527006).

Almost surely, 2^31391054011 is an apocalyptic number.

31391054011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31391054011 is an equidigital number, since it uses as much as digits as its factorization.

31391054011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The spelling of 31391054011 in words is "thirty-one billion, three hundred ninety-one million, fifty-four thousand, eleven".