30102172 has 24 divisors (see below), whose sum is σ = 56170800. Its totient is φ = 14065920.

The previous prime is 30102169. The next prime is 30102181. The reversal of 30102172 is 27120103.

It is a happy number.

It is a super-2 number, since 2×30102172² = 1812281518235168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8647 + ... + 11617.

It is an arithmetic number, because the mean of its divisors is an integer number (2340450).

Almost surely, 2^30102172 is an apocalyptic number.

It is an amenable number.

30102172 is a deficient number, since it is larger than the sum of its proper divisors (26068628).

30102172 is a wasteful number, since it uses less digits than its factorization.

30102172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 30102172 is about 5486.5446320977. The cubic root of 30102172 is about 311.0755977415.

Adding to 30102172 its reverse (27120103), we get a palindrome (57222275).

The spelling of 30102172 in words is "thirty million, one hundred two thousand, one hundred seventy-two".