31031013311 has 2 divisors, whose sum is σ = 31031013312. Its totient is φ = 31031013310.

The previous prime is 31031013259. The next prime is 31031013341. The reversal of 31031013311 is 11331013013.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31031013311 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31031013311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31031013341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515506655 + 15515506656.

It is an arithmetic number, because the mean of its divisors is an integer number (15515506656).

Almost surely, 2^31031013311 is an apocalyptic number.

31031013311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31031013311 is an equidigital number, since it uses as much as digits as its factorization.

31031013311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 31031013311 its reverse (11331013013), we get a palindrome (42362026324).

The spelling of 31031013311 in words is "thirty-one billion, thirty-one million, thirteen thousand, three hundred eleven".