172200001 has 4 divisors (see below), whose sum is σ = 172253952. Its totient is φ = 172146052.

The previous prime is 172199981. The next prime is 172200019. The reversal of 172200001 is 100002271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172200001 - 2¹¹ = 172197953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172200101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21865 + ... + 28678.

It is an arithmetic number, because the mean of its divisors is an integer number (43063488).

Almost surely, 2^172200001 is an apocalyptic number.

It is an amenable number.

172200001 is a deficient number, since it is larger than the sum of its proper divisors (53951).

172200001 is an equidigital number, since it uses as much as digits as its factorization.

172200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53950.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 172200001 is about 13122.4997999619. The cubic root of 172200001 is about 556.3452484119.

Adding to 172200001 its reverse (100002271), we get a palindrome (272202272).

The spelling of 172200001 in words is "one hundred seventy-two million, two hundred thousand, one".