31080103 has 4 divisors (see below), whose sum is σ = 31213728. Its totient is φ = 30946480.

The previous prime is 31080047. The next prime is 31080121. The reversal of 31080103 is 30108013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31080103 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 (31080193) 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, 66463 + ... + 66928.

It is an arithmetic number, because the mean of its divisors is an integer number (7803432).

Almost surely, 2^31080103 is an apocalyptic number.

31080103 is a deficient number, since it is larger than the sum of its proper divisors (133625).

31080103 is a wasteful number, since it uses less digits than its factorization.

31080103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133624.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 31080103 is about 5574.9531836599. The cubic root of 31080103 is about 314.4084067305.

Adding to 31080103 its reverse (30108013), we get a palindrome (61188116).

It can be divided in two parts, 3108010 and 3, that added together give a palindrome (3108013).

The spelling of 31080103 in words is "thirty-one million, eighty thousand, one hundred three".