30813207 has 8 divisors (see below), whose sum is σ = 41266176. Its totient is φ = 20451192.

The previous prime is 30813199. The next prime is 30813217. The reversal of 30813207 is 70231803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30813207 - 2³ = 30813199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30813217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21943 + ... + 23304.

It is an arithmetic number, because the mean of its divisors is an integer number (5158272).

Almost surely, 2^30813207 is an apocalyptic number.

30813207 is a deficient number, since it is larger than the sum of its proper divisors (10452969).

30813207 is a wasteful number, since it uses less digits than its factorization.

30813207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45477.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 30813207 is about 5550.9645107855. The cubic root of 30813207 is about 313.5058389415.

The spelling of 30813207 in words is "thirty million, eight hundred thirteen thousand, two hundred seven".