30845213 has 4 divisors (see below), whose sum is σ = 35251680. Its totient is φ = 26438748.

The previous prime is 30845209. The next prime is 30845219. The reversal of 30845213 is 31254803.

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: 31254803 = 283 ⋅110441.

It is not a de Polignac number, because 30845213 - 2² = 30845209 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 (30845219) 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, 2203223 + ... + 2203236.

It is an arithmetic number, because the mean of its divisors is an integer number (8812920).

Almost surely, 2^30845213 is an apocalyptic number.

It is an amenable number.

30845213 is a deficient number, since it is larger than the sum of its proper divisors (4406467).

30845213 is an equidigital number, since it uses as much as digits as its factorization.

30845213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4406466.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 30845213 is about 5553.8466849563. The cubic root of 30845213 is about 313.6143486435.

The spelling of 30845213 in words is "thirty million, eight hundred forty-five thousand, two hundred thirteen".