503135221 has 2 divisors, whose sum is σ = 503135222. Its totient is φ = 503135220.

The previous prime is 503135209. The next prime is 503135249. The reversal of 503135221 is 122531305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501132996 + 2002225 = 22386^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 503135221 - 2¹⁷ = 503004149 is a prime.

It is a super-2 number, since 2×503135221² = 506290101221437682, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 503135192 and 503135201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503135251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251567610 + 251567611.

It is an arithmetic number, because the mean of its divisors is an integer number (251567611).

Almost surely, 2^503135221 is an apocalyptic number.

It is an amenable number.

503135221 is a deficient number, since it is larger than the sum of its proper divisors (1).

503135221 is an equidigital number, since it uses as much as digits as its factorization.

503135221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 503135221 is about 22430.6758926253. The cubic root of 503135221 is about 795.3560215987.

Adding to 503135221 its reverse (122531305), we get a palindrome (625666526).

The spelling of 503135221 in words is "five hundred three million, one hundred thirty-five thousand, two hundred twenty-one".