172225605 has 8 divisors (see below), whose sum is σ = 275560992. Its totient is φ = 91853648.

The previous prime is 172225561. The next prime is 172225607. The reversal of 172225605 is 506522271.

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

It is a cyclic number.

It is not a de Polignac number, because 172225605 - 2⁹ = 172225093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172225607) 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, 5740839 + ... + 5740868.

It is an arithmetic number, because the mean of its divisors is an integer number (34445124).

Almost surely, 2^172225605 is an apocalyptic number.

172225605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172225605 is a deficient number, since it is larger than the sum of its proper divisors (103335387).

172225605 is a wasteful number, since it uses less digits than its factorization.

172225605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11481715.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 172225605 is about 13123.4753400157. The cubic root of 172225605 is about 556.3728209200.

Adding to 172225605 its reverse (506522271), we get a palindrome (678747876).

The spelling of 172225605 in words is "one hundred seventy-two million, two hundred twenty-five thousand, six hundred five".