30983213 has 4 divisors (see below), whose sum is σ = 30994368. Its totient is φ = 30972060.

The previous prime is 30983207. The next prime is 30983219. The reversal of 30983213 is 31238903.

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 a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (30983207) and next prime (30983219).

It is a cyclic number.

It is not a de Polignac number, because 30983213 - 2⁸ = 30982957 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 (30983219) 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, 2270 + ... + 8192.

It is an arithmetic number, because the mean of its divisors is an integer number (7748592).

Almost surely, 2^30983213 is an apocalyptic number.

It is an amenable number.

30983213 is a deficient number, since it is larger than the sum of its proper divisors (11155).

30983213 is an equidigital number, since it uses as much as digits as its factorization.

30983213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11154.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 30983213 is about 5566.2566415860. The cubic root of 30983213 is about 314.0813513911.

The spelling of 30983213 in words is "thirty million, nine hundred eighty-three thousand, two hundred thirteen".