172225805 has 6 divisors (see below), whose sum is σ = 206706186. Its totient is φ = 137757168.

The previous prime is 172225763. The next prime is 172225811. The reversal of 172225805 is 508522271.

It is a happy number.

172225805 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 3 ways, for example, as 3771364 + 168454441 = 1942^2 + 12979^2 .

It is not a de Polignac number, because 172225805 - 2⁶ = 172225741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26411 + ... + 32279.

It is an arithmetic number, because the mean of its divisors is an integer number (34451031).

Almost surely, 2^172225805 is an apocalyptic number.

It is an amenable number.

172225805 is a deficient number, since it is larger than the sum of its proper divisors (34480381).

172225805 is an frugal number, since it uses more digits than its factorization.

172225805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11743 (or 5874 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 172225805 is about 13123.4829599463. The cubic root of 172225805 is about 556.3730362858.

The spelling of 172225805 in words is "one hundred seventy-two million, two hundred twenty-five thousand, eight hundred five".