172117330 has 32 divisors (see below), whose sum is σ = 386259840. Its totient is φ = 53646720.

The previous prime is 172117327. The next prime is 172117339. The reversal of 172117330 is 33711271.

It is a super-4 number, since 4×172117330⁴ (a number of 34 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172117295 and 172117304.

It is not an unprimeable number, because it can be changed into a prime (172117339) 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 15 ways as a sum of consecutive naturals, for example, 110995 + ... + 112534.

It is an arithmetic number, because the mean of its divisors is an integer number (12070620).

Almost surely, 2^172117330 is an apocalyptic number.

172117330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172117330 is an abundant number, since it is smaller than the sum of its proper divisors (214142510).

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

172117330 is a wasteful number, since it uses less digits than its factorization.

172117330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223554.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 172117330 is about 13119.3494503348. The cubic root of 172117330 is about 556.2562027672.

The spelling of 172117330 in words is "one hundred seventy-two million, one hundred seventeen thousand, three hundred thirty".