50521565 has 4 divisors (see below), whose sum is σ = 60625884. Its totient is φ = 40417248.

The previous prime is 50521529. The next prime is 50521573. The reversal of 50521565 is 56512505.

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 34175716 + 16345849 = 5846^2 + 4043^2 .

It is a cyclic number.

It is not a de Polignac number, because 50521565 - 2⁸ = 50521309 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5052152 + ... + 5052161.

It is an arithmetic number, because the mean of its divisors is an integer number (15156471).

Almost surely, 2^50521565 is an apocalyptic number.

It is an amenable number.

50521565 is a deficient number, since it is larger than the sum of its proper divisors (10104319).

50521565 is a wasteful number, since it uses less digits than its factorization.

50521565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10104318.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 50521565 is about 7107.8523479318. The cubic root of 50521565 is about 369.6796960137.

The spelling of 50521565 in words is "fifty million, five hundred twenty-one thousand, five hundred sixty-five".