31331413313 has 4 divisors (see below), whose sum is σ = 31641625428. Its totient is φ = 31021201200.

The previous prime is 31331413291. The next prime is 31331413427.

31331413313 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16066069504 + 15265343809 = 126752^2 + 123553^2 .

It is a cyclic number.

It is not a de Polignac number, because 31331413313 - 2⁶ = 31331413249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31331412313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155105906 + ... + 155106107.

It is an arithmetic number, because the mean of its divisors is an integer number (7910406357).

Almost surely, 2^31331413313 is an apocalyptic number.

It is an amenable number.

31331413313 is a deficient number, since it is larger than the sum of its proper divisors (310212115).

31331413313 is a wasteful number, since it uses less digits than its factorization.

31331413313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310212114.

The product of its digits is 2916, while the sum is 26.

The spelling of 31331413313 in words is "thirty-one billion, three hundred thirty-one million, four hundred thirteen thousand, three hundred thirteen".