504660221 has 4 divisors (see below), whose sum is σ = 543480252. Its totient is φ = 465840192.

The previous prime is 504660193. The next prime is 504660239. The reversal of 504660221 is 122066405.

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 62188996 + 442471225 = 7886^2 + 21035^2 .

It is a cyclic number.

It is not a de Polignac number, because 504660221 - 2²⁶ = 437551357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504660241) 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, 19409996 + ... + 19410021.

It is an arithmetic number, because the mean of its divisors is an integer number (135870063).

Almost surely, 2^504660221 is an apocalyptic number.

It is an amenable number.

504660221 is a deficient number, since it is larger than the sum of its proper divisors (38820031).

504660221 is a wasteful number, since it uses less digits than its factorization.

504660221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38820030.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 504660221 is about 22464.6437986450. The cubic root of 504660221 is about 796.1587842840.

The spelling of 504660221 in words is "five hundred four million, six hundred sixty thousand, two hundred twenty-one".