50636521 has 4 divisors (see below), whose sum is σ = 54531652. Its totient is φ = 46741392.

The previous prime is 50636503. The next prime is 50636533. The reversal of 50636521 is 12563605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12563605 = 5 ⋅2512721.

It can be written as a sum of positive squares in 2 ways, for example, as 18826921 + 31809600 = 4339^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 50636521 - 2⁹ = 50636009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50636521.

It is not an unprimeable number, because it can be changed into a prime (50636021) 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, 1947546 + ... + 1947571.

It is an arithmetic number, because the mean of its divisors is an integer number (13632913).

Almost surely, 2^50636521 is an apocalyptic number.

It is an amenable number.

50636521 is a deficient number, since it is larger than the sum of its proper divisors (3895131).

50636521 is a wasteful number, since it uses less digits than its factorization.

50636521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895130.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 50636521 is about 7115.9343026759. The cubic root of 50636521 is about 369.9598714698.

The spelling of 50636521 in words is "fifty million, six hundred thirty-six thousand, five hundred twenty-one".