30140223 has 4 divisors (see below), whose sum is σ = 40186968. Its totient is φ = 20093480.

The previous prime is 30140221. The next prime is 30140239. The reversal of 30140223 is 32204103.

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 30140223 - 2¹ = 30140221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30140221) 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, 5023368 + ... + 5023373.

It is an arithmetic number, because the mean of its divisors is an integer number (10046742).

Almost surely, 2^30140223 is an apocalyptic number.

30140223 is a deficient number, since it is larger than the sum of its proper divisors (10046745).

30140223 is a wasteful number, since it uses less digits than its factorization.

30140223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10046744.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 30140223 is about 5490.0112021744. The cubic root of 30140223 is about 311.2066154591.

Adding to 30140223 its reverse (32204103), we get a palindrome (62344326).

The spelling of 30140223 in words is "thirty million, one hundred forty thousand, two hundred twenty-three".