31110013 has 4 divisors (see below), whose sum is σ = 33938208. Its totient is φ = 28281820.

The previous prime is 31109989. The next prime is 31110029. The reversal of 31110013 is 31001113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31110013 - 2²¹ = 29012861 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 (31111013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1414081 + ... + 1414102.

It is an arithmetic number, because the mean of its divisors is an integer number (8484552).

Almost surely, 2^31110013 is an apocalyptic number.

It is an amenable number.

31110013 is a deficient number, since it is larger than the sum of its proper divisors (2828195).

31110013 is a wasteful number, since it uses less digits than its factorization.

31110013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828194.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 31110013 is about 5577.6350723223. The cubic root of 31110013 is about 314.5092315832.

Adding to 31110013 its reverse (31001113), we get a palindrome (62111126).

Subtracting from 31110013 its reverse (31001113), we obtain a square (108900 = 330²).

It can be divided in two parts, 311100 and 13, that added together give a palindrome (311113).

The spelling of 31110013 in words is "thirty-one million, one hundred ten thousand, thirteen".