172222705 has 8 divisors (see below), whose sum is σ = 210566952. Its totient is φ = 135178368.

The previous prime is 172222691. The next prime is 172222717. The reversal of 172222705 is 507222271.

172222705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 80982001 + 91240704 = 8999^2 + 9552^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172222705 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324684 + ... + 325213.

It is an arithmetic number, because the mean of its divisors is an integer number (26320869).

Almost surely, 2^172222705 is an apocalyptic number.

It is an amenable number.

172222705 is a deficient number, since it is larger than the sum of its proper divisors (38344247).

172222705 is an equidigital number, since it uses as much as digits as its factorization.

172222705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649955.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 172222705 is about 13123.3648505252. The cubic root of 172222705 is about 556.3696980970.

Adding to 172222705 its reverse (507222271), we get a palindrome (679444976).

The spelling of 172222705 in words is "one hundred seventy-two million, two hundred twenty-two thousand, seven hundred five".