50505421 has 4 divisors (see below), whose sum is σ = 50519872. Its totient is φ = 50490972.

The previous prime is 50505409. The next prime is 50505431. The reversal of 50505421 is 12450505.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12450505 = 5 ⋅2490101.

It is a cyclic number.

It is not a de Polignac number, because 50505421 - 2²³ = 42116813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50505392 and 50505401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50505431) 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, 1660 + ... + 10186.

It is an arithmetic number, because the mean of its divisors is an integer number (12629968).

Almost surely, 2^50505421 is an apocalyptic number.

It is an amenable number.

50505421 is a deficient number, since it is larger than the sum of its proper divisors (14451).

50505421 is an equidigital number, since it uses as much as digits as its factorization.

50505421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14450.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 50505421 is about 7106.7166117695. The cubic root of 50505421 is about 369.6403151749.

Adding to 50505421 its reverse (12450505), we get a palindrome (62955926).

The spelling of 50505421 in words is "fifty million, five hundred five thousand, four hundred twenty-one".