30223139 has 4 divisors (see below), whose sum is σ = 30522480. Its totient is φ = 29923800.

The previous prime is 30223111. The next prime is 30223147. The reversal of 30223139 is 93132203.

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

It is a cyclic number.

It is not a de Polignac number, because 30223139 - 2¹² = 30219043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30223189) 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 3 ways as a sum of consecutive naturals, for example, 149519 + ... + 149720.

It is an arithmetic number, because the mean of its divisors is an integer number (7630620).

Almost surely, 2^30223139 is an apocalyptic number.

30223139 is a deficient number, since it is larger than the sum of its proper divisors (299341).

30223139 is a wasteful number, since it uses less digits than its factorization.

30223139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299340.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 30223139 is about 5497.5575485846. The cubic root of 30223139 is about 311.4917314814.

The spelling of 30223139 in words is "thirty million, two hundred twenty-three thousand, one hundred thirty-nine".