172722665 has 8 divisors (see below), whose sum is σ = 207605760. Its totient is φ = 137952432.

The previous prime is 172722631. The next prime is 172722721. The reversal of 172722665 is 566227271.

It is a happy number.

172722665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 172722665 - 2¹⁶ = 172657129 is a prime.

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, 24809 + ... + 30998.

It is an arithmetic number, because the mean of its divisors is an integer number (25950720).

Almost surely, 2^172722665 is an apocalyptic number.

It is an amenable number.

172722665 is a deficient number, since it is larger than the sum of its proper divisors (34883095).

172722665 is an equidigital number, since it uses as much as digits as its factorization.

172722665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56431.

The product of its digits is 70560, while the sum is 38.

The square root of 172722665 is about 13142.3995145483. The cubic root of 172722665 is about 556.9075556736.

The spelling of 172722665 in words is "one hundred seventy-two million, seven hundred twenty-two thousand, six hundred sixty-five".