50221509 has 8 divisors (see below), whose sum is σ = 72112992. Its totient is φ = 30905520.

The previous prime is 50221499. The next prime is 50221513. The reversal of 50221509 is 90512205.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50221509 - 2⁵ = 50221477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50221559) 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, 643827 + ... + 643904.

It is an arithmetic number, because the mean of its divisors is an integer number (9014124).

Almost surely, 2^50221509 is an apocalyptic number.

It is an amenable number.

50221509 is a deficient number, since it is larger than the sum of its proper divisors (21891483).

50221509 is a wasteful number, since it uses less digits than its factorization.

50221509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287747.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 50221509 is about 7086.7135542507. The cubic root of 50221509 is about 368.9463792063.

The spelling of 50221509 in words is "fifty million, two hundred twenty-one thousand, five hundred nine".