30172172 has 6 divisors (see below), whose sum is σ = 52801308. Its totient is φ = 15086084.

The previous prime is 30172169. The next prime is 30172183. The reversal of 30172172 is 27127103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3771518 + ... + 3771525.

It is an arithmetic number, because the mean of its divisors is an integer number (8800218).

Almost surely, 2^30172172 is an apocalyptic number.

It is an amenable number.

30172172 is a deficient number, since it is larger than the sum of its proper divisors (22629136).

30172172 is a wasteful number, since it uses less digits than its factorization.

30172172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543047 (or 7543045 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 30172172 is about 5492.9201705468. The cubic root of 30172172 is about 311.3165375510.

Adding to 30172172 its reverse (27127103), we get a palindrome (57299275).

The spelling of 30172172 in words is "thirty million, one hundred seventy-two thousand, one hundred seventy-two".