50665521 has 4 divisors (see below), whose sum is σ = 67554032. Its totient is φ = 33777012.

The previous prime is 50665493. The next prime is 50665541. The reversal of 50665521 is 12556605.

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 not a de Polignac number, because 50665521 - 2⁷ = 50665393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50665541) 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, 8444251 + ... + 8444256.

It is an arithmetic number, because the mean of its divisors is an integer number (16888508).

Almost surely, 2^50665521 is an apocalyptic number.

It is an amenable number.

50665521 is a deficient number, since it is larger than the sum of its proper divisors (16888511).

50665521 is a wasteful number, since it uses less digits than its factorization.

50665521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16888510.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 50665521 is about 7117.9716914301. The cubic root of 50665521 is about 370.0304844618.

The spelling of 50665521 in words is "fifty million, six hundred sixty-five thousand, five hundred twenty-one".