30203113 has 4 divisors (see below), whose sum is σ = 30698308. Its totient is φ = 29707920.

The previous prime is 30203099. The next prime is 30203153. The reversal of 30203113 is 31130203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31130203 = 13 ⋅2394631.

It can be written as a sum of positive squares in 2 ways, for example, as 12588304 + 17614809 = 3548^2 + 4197^2 .

It is a cyclic number.

It is not a de Polignac number, because 30203113 - 2¹³ = 30194921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30203093 and 30203102.

It is not an unprimeable number, because it can be changed into a prime (30203153) 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, 247506 + ... + 247627.

It is an arithmetic number, because the mean of its divisors is an integer number (7674577).

Almost surely, 2^30203113 is an apocalyptic number.

It is an amenable number.

30203113 is a deficient number, since it is larger than the sum of its proper divisors (495195).

30203113 is an equidigital number, since it uses as much as digits as its factorization.

30203113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495194.

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

The square root of 30203113 is about 5495.7358924897. The cubic root of 30203113 is about 311.4229176312.

Adding to 30203113 its reverse (31130203), we get a palindrome (61333316).

The spelling of 30203113 in words is "thirty million, two hundred three thousand, one hundred thirteen".