30220172 has 6 divisors (see below), whose sum is σ = 52885308. Its totient is φ = 15110084.

The previous prime is 30220171. The next prime is 30220207. The reversal of 30220172 is 27102203.

It is a self number, because there is not a number n which added to its sum of digits gives 30220172.

It is not an unprimeable number, because it can be changed into a prime (30220171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3777518 + ... + 3777525.

It is an arithmetic number, because the mean of its divisors is an integer number (8814218).

Almost surely, 2^30220172 is an apocalyptic number.

It is an amenable number.

30220172 is a deficient number, since it is larger than the sum of its proper divisors (22665136).

30220172 is a wasteful number, since it uses less digits than its factorization.

30220172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7555047 (or 7555045 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 30220172 is about 5497.2876948546. The cubic root of 30220172 is about 311.4815381192.

Adding to 30220172 its reverse (27102203), we get a palindrome (57322375).

The spelling of 30220172 in words is "thirty million, two hundred twenty thousand, one hundred seventy-two".