503725221 has 12 divisors (see below), whose sum is σ = 745350060. Its totient is φ = 327625920.

The previous prime is 503725217. The next prime is 503725223. The reversal of 503725221 is 122527305.

It can be written as a sum of positive squares in 2 ways, for example, as 179184996 + 324540225 = 13386^2 + 18015^2 .

It is not a de Polignac number, because 503725221 - 2² = 503725217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503725223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 682186 + ... + 682923.

It is an arithmetic number, because the mean of its divisors is an integer number (62112505).

Almost surely, 2^503725221 is an apocalyptic number.

It is an amenable number.

503725221 is a deficient number, since it is larger than the sum of its proper divisors (241624839).

503725221 is a wasteful number, since it uses less digits than its factorization.

503725221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365156 (or 1365153 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 503725221 is about 22443.8236715583. The cubic root of 503725221 is about 795.6667907698. Note that the first 3 decimals are identical.

The spelling of 503725221 in words is "five hundred three million, seven hundred twenty-five thousand, two hundred twenty-one".