31113103 has 4 divisors (see below), whose sum is σ = 35557840. Its totient is φ = 26668368.

The previous prime is 31113083. The next prime is 31113109. The reversal of 31113103 is 30131113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31113103 - 2²¹ = 29015951 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 (31113109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222358 + ... + 2222371.

It is an arithmetic number, because the mean of its divisors is an integer number (8889460).

Almost surely, 2^31113103 is an apocalyptic number.

31113103 is a deficient number, since it is larger than the sum of its proper divisors (4444737).

31113103 is an equidigital number, since it uses as much as digits as its factorization.

31113103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444736.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 31113103 is about 5577.9120645632. The cubic root of 31113103 is about 314.5196441080.

Adding to 31113103 its reverse (30131113), we get a palindrome (61244216).

The spelling of 31113103 in words is "thirty-one million, one hundred thirteen thousand, one hundred three".