503542221 has 16 divisors (see below), whose sum is σ = 826326144. Its totient is φ = 265604544.

The previous prime is 503542189. The next prime is 503542223. The reversal of 503542221 is 122245305.

It is not a de Polignac number, because 503542221 - 2⁵ = 503542189 is a prime.

It is a super-2 number, since 2×503542221² = 507109536659225682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 503542191 and 503542200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503542223) 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, 921966 + ... + 922511.

It is an arithmetic number, because the mean of its divisors is an integer number (51645384).

Almost surely, 2^503542221 is an apocalyptic number.

It is an amenable number.

503542221 is a deficient number, since it is larger than the sum of its proper divisors (322783923).

503542221 is a wasteful number, since it uses less digits than its factorization.

503542221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844500.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 503542221 is about 22439.7464557869. The cubic root of 503542221 is about 795.5704256267.

Adding to 503542221 its reverse (122245305), we get a palindrome (625787526).

The spelling of 503542221 in words is "five hundred three million, five hundred forty-two thousand, two hundred twenty-one".