50172217 has 4 divisors (see below), whose sum is σ = 52812880. Its totient is φ = 47531556.

The previous prime is 50172209. The next prime is 50172263. The reversal of 50172217 is 71227105.

It is a happy number.

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 50172217 - 2³ = 50172209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50172191 and 50172200.

It is not an unprimeable number, because it can be changed into a prime (50172517) 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, 1320303 + ... + 1320340.

It is an arithmetic number, because the mean of its divisors is an integer number (13203220).

Almost surely, 2^50172217 is an apocalyptic number.

It is an amenable number.

50172217 is a deficient number, since it is larger than the sum of its proper divisors (2640663).

50172217 is a wasteful number, since it uses less digits than its factorization.

50172217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640662.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 50172217 is about 7083.2349248066. The cubic root of 50172217 is about 368.8256337437.

The spelling of 50172217 in words is "fifty million, one hundred seventy-two thousand, two hundred seventeen".