31321113 has 8 divisors (see below), whose sum is σ = 41870400. Its totient is φ = 20826288.

The previous prime is 31321109. The next prime is 31321127. The reversal of 31321113 is 31112313.

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

It is not a de Polignac number, because 31321113 - 2² = 31321109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31321092 and 31321101.

It is not an unprimeable number, because it can be changed into a prime (31321133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12253 + ... + 14586.

It is an arithmetic number, because the mean of its divisors is an integer number (5233800).

Almost surely, 2^31321113 is an apocalyptic number.

It is an amenable number.

31321113 is a deficient number, since it is larger than the sum of its proper divisors (10549287).

31321113 is a wasteful number, since it uses less digits than its factorization.

31321113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27231.

The product of its digits is 54, while the sum is 15.

The square root of 31321113 is about 5596.5268694075. The cubic root of 31321113 is about 315.2190061772.

Adding to 31321113 its reverse (31112313), we get a palindrome (62433426).

The spelling of 31321113 in words is "thirty-one million, three hundred twenty-one thousand, one hundred thirteen".