500540221 has 4 divisors (see below), whose sum is σ = 502745472. Its totient is φ = 498334972.

The previous prime is 500540171. The next prime is 500540281. The reversal of 500540221 is 122045005.

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 an emirpimes, since its reverse is a distinct semiprime: 122045005 = 5 ⋅24409001.

It is a cyclic number.

It is not a de Polignac number, because 500540221 - 2⁷ = 500540093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500540281) 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, 1102285 + ... + 1102738.

It is an arithmetic number, because the mean of its divisors is an integer number (125686368).

Almost surely, 2^500540221 is an apocalyptic number.

It is an amenable number.

500540221 is a deficient number, since it is larger than the sum of its proper divisors (2205251).

500540221 is a wasteful number, since it uses less digits than its factorization.

500540221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205250.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 500540221 is about 22372.7562226919. The cubic root of 500540221 is about 793.9862722259.

Adding to 500540221 its reverse (122045005), we get a palindrome (622585226).

The spelling of 500540221 in words is "five hundred million, five hundred forty thousand, two hundred twenty-one".