50400221 has 4 divisors (see below), whose sum is σ = 50417472. Its totient is φ = 50382972.

The previous prime is 50400197. The next prime is 50400241. The reversal of 50400221 is 12200405.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50400221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 50400196 and 50400205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50400241) 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, 3035 + ... + 10488.

It is an arithmetic number, because the mean of its divisors is an integer number (12604368).

Almost surely, 2^50400221 is an apocalyptic number.

It is an amenable number.

50400221 is a deficient number, since it is larger than the sum of its proper divisors (17251).

50400221 is a wasteful number, since it uses less digits than its factorization.

50400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17250.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 50400221 is about 7099.3113046267. The cubic root of 50400221 is about 369.3834899938.

Adding to 50400221 its reverse (12200405), we get a palindrome (62600626).

The spelling of 50400221 in words is "fifty million, four hundred thousand, two hundred twenty-one".