30172225 has 12 divisors (see below), whose sum is σ = 37557244. Its totient is φ = 24045120.

The previous prime is 30172217. The next prime is 30172237. The reversal of 30172225 is 52227103.

It can be written as a sum of positive squares in 6 ways, for example, as 97969 + 30074256 = 313^2 + 5484^2 .

It is not a de Polignac number, because 30172225 - 2³ = 30172217 is a prime.

It is a super-2 number, since 2×30172225² = 1820726322901250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30172196 and 30172205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4747 + ... + 9103.

Almost surely, 2^30172225 is an apocalyptic number.

It is an amenable number.

30172225 is a deficient number, since it is larger than the sum of its proper divisors (7385019).

30172225 is a wasteful number, since it uses less digits than its factorization.

30172225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644 (or 4639 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 30172225 is about 5492.9249949367. The cubic root of 30172225 is about 311.3167198355.

Adding to 30172225 its reverse (52227103), we get a palindrome (82399328).

The spelling of 30172225 in words is "thirty million, one hundred seventy-two thousand, two hundred twenty-five".