30172130 has 16 divisors (see below), whose sum is σ = 54792504. Its totient is φ = 11961600.

The previous prime is 30172117. The next prime is 30172139. The reversal of 30172130 is 3127103.

It can be written as a sum of positive squares in 4 ways, for example, as 7524049 + 22648081 = 2743^2 + 4759^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30172099 and 30172108.

It is not an unprimeable number, because it can be changed into a prime (30172139) by changing a digit.

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, 12221 + ... + 14480.

Almost surely, 2^30172130 is an apocalyptic number.

30172130 is a deficient number, since it is larger than the sum of its proper divisors (24620374).

30172130 is a wasteful number, since it uses less digits than its factorization.

30172130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26821.

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

The square root of 30172130 is about 5492.9163474424. The cubic root of 30172130 is about 311.3163930989.

Adding to 30172130 its reverse (3127103), we get a palindrome (33299233).

The spelling of 30172130 in words is "thirty million, one hundred seventy-two thousand, one hundred thirty".