30812103 has 16 divisors (see below), whose sum is σ = 52168960. Its totient is φ = 17606808.

The previous prime is 30812099. The next prime is 30812113. The reversal of 30812103 is 30121803.

It is not a de Polignac number, because 30812103 - 2² = 30812099 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 (30812113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81325 + ... + 81702.

It is an arithmetic number, because the mean of its divisors is an integer number (3260560).

Almost surely, 2^30812103 is an apocalyptic number.

30812103 is a deficient number, since it is larger than the sum of its proper divisors (21356857).

30812103 is a wasteful number, since it uses less digits than its factorization.

30812103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163043 (or 163037 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 30812103 is about 5550.8650677169. The cubic root of 30812103 is about 313.5020947183.

Adding to 30812103 its reverse (30121803), we get a palindrome (60933906).

It can be divided in two parts, 3081 and 2103, that added together give a square (5184 = 72²).

The spelling of 30812103 in words is "thirty million, eight hundred twelve thousand, one hundred three".