172223001 has 12 divisors (see below), whose sum is σ = 254834580. Its totient is φ = 112014720.

The previous prime is 172222957. The next prime is 172223021. The reversal of 172223001 is 100322271.

It can be written as a sum of positive squares in 2 ways, for example, as 42263001 + 129960000 = 6501^2 + 11400^2 .

It is not a de Polignac number, because 172223001 - 2¹⁰ = 172221977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172223021) 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 11 ways as a sum of consecutive naturals, for example, 232996 + ... + 233733.

It is an arithmetic number, because the mean of its divisors is an integer number (21236215).

Almost surely, 2^172223001 is an apocalyptic number.

It is an amenable number.

172223001 is a deficient number, since it is larger than the sum of its proper divisors (82611579).

172223001 is a wasteful number, since it uses less digits than its factorization.

172223001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466776 (or 466773 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 172223001 is about 13123.3761281158. The cubic root of 172223001 is about 556.3700168419.

Adding to 172223001 its reverse (100322271), we get a palindrome (272545272).

The spelling of 172223001 in words is "one hundred seventy-two million, two hundred twenty-three thousand, one".