31320013311 has 20 divisors (see below), whose sum is σ = 48400024200. Its totient is φ = 20160007056.

The previous prime is 31320013303. The next prime is 31320013313. The reversal of 31320013311 is 11331002313.

It is a happy number.

31320013311 is a `hidden beast` number, since 31 + 320 + 0 + 1 + 3 + 311 = 666.

It is not a de Polignac number, because 31320013311 - 2³ = 31320013303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320013313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6664321 + ... + 6669018.

It is an arithmetic number, because the mean of its divisors is an integer number (2420001210).

Almost surely, 2^31320013311 is an apocalyptic number.

31320013311 is a deficient number, since it is larger than the sum of its proper divisors (17080010889).

31320013311 is a wasteful number, since it uses less digits than its factorization.

31320013311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13333380 (or 13333371 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31320013311 its reverse (11331002313), we get a palindrome (42651015624).

The spelling of 31320013311 in words is "thirty-one billion, three hundred twenty million, thirteen thousand, three hundred eleven".