31117413 has 32 divisors (see below), whose sum is σ = 45121536. Its totient is φ = 19027008.

The previous prime is 31117403. The next prime is 31117417. The reversal of 31117413 is 31471113.

It is not a de Polignac number, because 31117413 - 2¹⁷ = 30986341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31117413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31117417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244956 + ... + 245082.

It is an arithmetic number, because the mean of its divisors is an integer number (1410048).

Almost surely, 2^31117413 is an apocalyptic number.

It is an amenable number.

31117413 is a deficient number, since it is larger than the sum of its proper divisors (14004123).

31117413 is a wasteful number, since it uses less digits than its factorization.

31117413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

The product of its digits is 252, while the sum is 21.

The square root of 31117413 is about 5578.2983964646. The cubic root of 31117413 is about 314.5341665755.

Adding to 31117413 its reverse (31471113), we get a palindrome (62588526).

The spelling of 31117413 in words is "thirty-one million, one hundred seventeen thousand, four hundred thirteen".