50811421 has 4 divisors (see below), whose sum is σ = 50827644. Its totient is φ = 50795200.

The previous prime is 50811407. The next prime is 50811427. The reversal of 50811421 is 12411805.

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 49632025 + 1179396 = 7045^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 50811421 - 2⁵ = 50811389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50811392 and 50811401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50811427) 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, 1750 + ... + 10231.

It is an arithmetic number, because the mean of its divisors is an integer number (12706911).

Almost surely, 2^50811421 is an apocalyptic number.

It is an amenable number.

50811421 is a deficient number, since it is larger than the sum of its proper divisors (16223).

50811421 is a wasteful number, since it uses less digits than its factorization.

50811421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16222.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 50811421 is about 7128.2130299255. The cubic root of 50811421 is about 370.3853326725.

The spelling of 50811421 in words is "fifty million, eight hundred eleven thousand, four hundred twenty-one".