52172209 has 8 divisors (see below), whose sum is σ = 53399808. Its totient is φ = 50949600.

The previous prime is 52172171. The next prime is 52172231. The reversal of 52172209 is 90227125.

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 52172209 - 2²¹ = 50075057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52172249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27324 + ... + 29170.

It is an arithmetic number, because the mean of its divisors is an integer number (6674976).

Almost surely, 2^52172209 is an apocalyptic number.

It is an amenable number.

52172209 is a deficient number, since it is larger than the sum of its proper divisors (1227599).

52172209 is a wasteful number, since it uses less digits than its factorization.

52172209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 52172209 is about 7223.0332271145. The cubic root of 52172209 is about 373.6626950137.

The spelling of 52172209 in words is "fifty-two million, one hundred seventy-two thousand, two hundred nine".