172272545 has 4 divisors (see below), whose sum is σ = 206727060. Its totient is φ = 137818032.

The previous prime is 172272533. The next prime is 172272587. The reversal of 172272545 is 545272271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26635921 + 145636624 = 5161^2 + 12068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172272545 is a prime.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17227250 + ... + 17227259.

It is an arithmetic number, because the mean of its divisors is an integer number (51681765).

Almost surely, 2^172272545 is an apocalyptic number.

It is an amenable number.

172272545 is a deficient number, since it is larger than the sum of its proper divisors (34454515).

172272545 is an equidigital number, since it uses as much as digits as its factorization.

172272545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34454514.

The product of its digits is 39200, while the sum is 35.

The square root of 172272545 is about 13125.2636164002. The cubic root of 172272545 is about 556.4233627039.

The spelling of 172272545 in words is "one hundred seventy-two million, two hundred seventy-two thousand, five hundred forty-five".