50145221 has 16 divisors (see below), whose sum is σ = 60825600. Its totient is φ = 40408368.

The previous prime is 50145209. The next prime is 50145253. The reversal of 50145221 is 12254105.

It is not a de Polignac number, because 50145221 - 2¹⁰ = 50144197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50145193 and 50145202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50145281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6860 + ... + 12138.

It is an arithmetic number, because the mean of its divisors is an integer number (3801600).

Almost surely, 2^50145221 is an apocalyptic number.

It is an amenable number.

50145221 is a deficient number, since it is larger than the sum of its proper divisors (10680379).

50145221 is a wasteful number, since it uses less digits than its factorization.

50145221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 50145221 is about 7081.3290419243. The cubic root of 50145221 is about 368.7594709432.

Adding to 50145221 its reverse (12254105), we get a palindrome (62399326).

The spelling of 50145221 in words is "fifty million, one hundred forty-five thousand, two hundred twenty-one".