30225891 has 4 divisors (see below), whose sum is σ = 40301192. Its totient is φ = 20150592.

The previous prime is 30225883. The next prime is 30225893. The reversal of 30225891 is 19852203.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30225891 - 2³ = 30225883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30225893) 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, 5037646 + ... + 5037651.

It is an arithmetic number, because the mean of its divisors is an integer number (10075298).

Almost surely, 2^30225891 is an apocalyptic number.

30225891 is a deficient number, since it is larger than the sum of its proper divisors (10075301).

30225891 is a wasteful number, since it uses less digits than its factorization.

30225891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10075300.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 30225891 is about 5497.8078358560. The cubic root of 30225891 is about 311.5011855979.

The spelling of 30225891 in words is "thirty million, two hundred twenty-five thousand, eight hundred ninety-one".