172331306 has 8 divisors (see below), whose sum is σ = 295425120. Its totient is φ = 73856268.

The previous prime is 172331297. The next prime is 172331309. The reversal of 172331306 is 603133271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (172331309) 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 3 ways as a sum of consecutive naturals, for example, 6154676 + ... + 6154703.

It is an arithmetic number, because the mean of its divisors is an integer number (36928140).

Almost surely, 2^172331306 is an apocalyptic number.

172331306 is a deficient number, since it is larger than the sum of its proper divisors (123093814).

172331306 is a wasteful number, since it uses less digits than its factorization.

172331306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12309388.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 172331306 is about 13127.5018948770. The cubic root of 172331306 is about 556.4866195942.

Adding to 172331306 its reverse (603133271), we get a palindrome (775464577).

The spelling of 172331306 in words is "one hundred seventy-two million, three hundred thirty-one thousand, three hundred six".