30172223 has 4 divisors (see below), whose sum is σ = 30187200. Its totient is φ = 30157248.

The previous prime is 30172217. The next prime is 30172237. The reversal of 30172223 is 32227103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32227103 = 859 ⋅37517.

It is a cyclic number.

It is not a de Polignac number, because 30172223 - 2¹⁰ = 30171199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30172195 and 30172204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30172213) 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, 3890 + ... + 8687.

It is an arithmetic number, because the mean of its divisors is an integer number (7546800).

Almost surely, 2^30172223 is an apocalyptic number.

30172223 is a deficient number, since it is larger than the sum of its proper divisors (14977).

30172223 is a wasteful number, since it uses less digits than its factorization.

30172223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14976.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 30172223 is about 5492.9248128843. The cubic root of 30172223 is about 311.3167129569.

Adding to 30172223 its reverse (32227103), we get a palindrome (62399326).

The spelling of 30172223 in words is "thirty million, one hundred seventy-two thousand, two hundred twenty-three".