30021173 has 12 divisors (see below), whose sum is σ = 37609740. Its totient is φ = 23752512.

The previous prime is 30021163. The next prime is 30021179. The reversal of 30021173 is 37112003.

It can be written as a sum of positive squares in 2 ways, for example, as 1270129 + 28751044 = 1127^2 + 5362^2 .

It is not a de Polignac number, because 30021173 - 2⁴ = 30021157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30021179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22928 + ... + 24201.

It is an arithmetic number, because the mean of its divisors is an integer number (3134145).

Almost surely, 2^30021173 is an apocalyptic number.

It is an amenable number.

30021173 is a deficient number, since it is larger than the sum of its proper divisors (7588567).

30021173 is a wasteful number, since it uses less digits than its factorization.

30021173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47156 (or 47149 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 30021173 is about 5479.1580557600. The cubic root of 30021173 is about 310.7963327760.

Adding to 30021173 its reverse (37112003), we get a palindrome (67133176).

The spelling of 30021173 in words is "thirty million, twenty-one thousand, one hundred seventy-three".