31431312311 has 16 divisors (see below), whose sum is σ = 36215155200. Its totient is φ = 26721262368.

The previous prime is 31431312301. The next prime is 31431312389. The reversal of 31431312311 is 11321313413.

It is a cyclic number.

It is not a de Polignac number, because 31431312311 - 2²² = 31427118007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431312301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019105 + ... + 1049493.

It is an arithmetic number, because the mean of its divisors is an integer number (2263447200).

Almost surely, 2^31431312311 is an apocalyptic number.

31431312311 is a deficient number, since it is larger than the sum of its proper divisors (4783842889).

31431312311 is a wasteful number, since it uses less digits than its factorization.

31431312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31598.

The product of its digits is 648, while the sum is 23.

Adding to 31431312311 its reverse (11321313413), we get a palindrome (42752625724).

The spelling of 31431312311 in words is "thirty-one billion, four hundred thirty-one million, three hundred twelve thousand, three hundred eleven".