31103413 has 6 divisors (see below), whose sum is σ = 34188182. Its totient is φ = 28275720.

The previous prime is 31103381. The next prime is 31103417. The reversal of 31103413 is 31430113.

It can be written as a sum of positive squares in only one way, i.e., 31102929 + 484 = 5577^2 + 22^2 .

It is not a de Polignac number, because 31103413 - 2⁵ = 31103381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128406 + ... + 128647.

Almost surely, 2^31103413 is an apocalyptic number.

It is an amenable number.

31103413 is a deficient number, since it is larger than the sum of its proper divisors (3084769).

31103413 is a wasteful number, since it uses less digits than its factorization.

31103413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257075 (or 257064 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 31103413 is about 5577.0433923361. The cubic root of 31103413 is about 314.4869889295.

Adding to 31103413 its reverse (31430113), we get a palindrome (62533526).

The spelling of 31103413 in words is "thirty-one million, one hundred three thousand, four hundred thirteen".