30245209 has 4 divisors (see below), whose sum is σ = 30279040. Its totient is φ = 30211380.

The previous prime is 30245191. The next prime is 30245233. The reversal of 30245209 is 90254203.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90254203 = 13 ⋅6942631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30245209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30240209) 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, 15537 + ... + 17374.

It is an arithmetic number, because the mean of its divisors is an integer number (7569760).

Almost surely, 2^30245209 is an apocalyptic number.

It is an amenable number.

30245209 is a deficient number, since it is larger than the sum of its proper divisors (33831).

30245209 is an equidigital number, since it uses as much as digits as its factorization.

30245209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33830.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30245209 is about 5499.5644372986. The cubic root of 30245209 is about 311.5675337757.

The spelling of 30245209 in words is "thirty million, two hundred forty-five thousand, two hundred nine".