172168530 has 16 divisors (see below), whose sum is σ = 413204544. Its totient is φ = 45911600.

The previous prime is 172168523. The next prime is 172168531. The reversal of 172168530 is 35861271.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 172168491 and 172168500.

It is not an unprimeable number, because it can be changed into a prime (172168531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869446 + ... + 2869505.

It is an arithmetic number, because the mean of its divisors is an integer number (25825284).

Almost surely, 2^172168530 is an apocalyptic number.

172168530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172168530 is an abundant number, since it is smaller than the sum of its proper divisors (241036014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172168530 is a wasteful number, since it uses less digits than its factorization.

172168530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5738961.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 172168530 is about 13121.3006215085. The cubic root of 172168530 is about 556.3113540875.

The spelling of 172168530 in words is "one hundred seventy-two million, one hundred sixty-eight thousand, five hundred thirty".