31123331313 has 8 divisors (see below), whose sum is σ = 41596816800. Its totient is φ = 20699366688.

The previous prime is 31123331297. The next prime is 31123331341. The reversal of 31123331313 is 31313332113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31123331313 - 2⁴ = 31123331297 is a prime.

It is a super-3 number, since 3×31123331313³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31123331513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12378748 + ... + 12381261.

It is an arithmetic number, because the mean of its divisors is an integer number (5199602100).

Almost surely, 2^31123331313 is an apocalyptic number.

It is an amenable number.

31123331313 is a deficient number, since it is larger than the sum of its proper divisors (10473485487).

31123331313 is a wasteful number, since it uses less digits than its factorization.

31123331313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24760431.

The product of its digits is 1458, while the sum is 24.

Adding to 31123331313 its reverse (31313332113), we get a palindrome (62436663426).

The spelling of 31123331313 in words is "thirty-one billion, one hundred twenty-three million, three hundred thirty-one thousand, three hundred thirteen".