30312103 has 2 divisors, whose sum is σ = 30312104. Its totient is φ = 30312102.

The previous prime is 30312089. The next prime is 30312127. The reversal of 30312103 is 30121303.

It is a weak prime.

It is an emirp because it is prime and its reverse (30121303) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30312103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30352103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156051 + 15156052.

It is an arithmetic number, because the mean of its divisors is an integer number (15156052).

Almost surely, 2^30312103 is an apocalyptic number.

30312103 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312103 is an equidigital number, since it uses as much as digits as its factorization.

30312103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30312103 is about 5505.6428325855. The cubic root of 30312103 is about 311.7970649155.

Adding to 30312103 its reverse (30121303), we get a palindrome (60433406).

The spelling of 30312103 in words is "thirty million, three hundred twelve thousand, one hundred three".