503420161 has 2 divisors, whose sum is σ = 503420162. Its totient is φ = 503420160.

The previous prime is 503420119. The next prime is 503420173. The reversal of 503420161 is 161024305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503149761 + 270400 = 22431^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 503420161 - 2¹³ = 503411969 is a prime.

It is not a weakly prime, because it can be changed into another prime (503421161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251710080 + 251710081.

It is an arithmetic number, because the mean of its divisors is an integer number (251710081).

Almost surely, 2^503420161 is an apocalyptic number.

It is an amenable number.

503420161 is a deficient number, since it is larger than the sum of its proper divisors (1).

503420161 is an equidigital number, since it uses as much as digits as its factorization.

503420161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 503420161 is about 22437.0265632503. The cubic root of 503420161 is about 795.5061376223.

Adding to 503420161 its reverse (161024305), we get a palindrome (664444466).

The spelling of 503420161 in words is "five hundred three million, four hundred twenty thousand, one hundred sixty-one".