31000103 has 4 divisors (see below), whose sum is σ = 31109928. Its totient is φ = 30890280.

The previous prime is 31000087. The next prime is 31000127. The reversal of 31000103 is 30100013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30100013 = 17 ⋅1770589.

It is a cyclic number.

It is not a de Polignac number, because 31000103 - 2⁴ = 31000087 is a prime.

It is a super-2 number, since 2×31000103² = 1922012772021218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000183) 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, 54488 + ... + 55053.

It is an arithmetic number, because the mean of its divisors is an integer number (7777482).

Almost surely, 2^31000103 is an apocalyptic number.

31000103 is a deficient number, since it is larger than the sum of its proper divisors (109825).

31000103 is a wasteful number, since it uses less digits than its factorization.

31000103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109824.

The product of its (nonzero) digits is 9, while the sum is 8.

The square root of 31000103 is about 5567.7736124954. The cubic root of 31000103 is about 314.1384131551.

Adding to 31000103 its reverse (30100013), we get a palindrome (61100116).

It can be divided in two parts, 3100010 and 3, that added together give a palindrome (3100013).

The spelling of 31000103 in words is "thirty-one million, one hundred three", and thus it is an aban number.