503531324462161 has 2 divisors, whose sum is σ = 503531324462162. Its totient is φ = 503531324462160.

The previous prime is 503531324462113. The next prime is 503531324462171. The reversal of 503531324462161 is 161264423135305.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255108617294400 + 248422707167761 = 15972120^2 + 15761431^2 .

It is a cyclic number.

It is not a de Polignac number, because 503531324462161 - 2¹⁷ = 503531324331089 is a prime.

It is not a weakly prime, because it can be changed into another prime (503531324462171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251765662231080 + 251765662231081.

It is an arithmetic number, because the mean of its divisors is an integer number (251765662231081).

Almost surely, 2^{503531324462161} is an apocalyptic number.

It is an amenable number.

503531324462161 is a deficient number, since it is larger than the sum of its proper divisors (1).

503531324462161 is an equidigital number, since it uses as much as digits as its factorization.

503531324462161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 46.

Adding to 503531324462161 its reverse (161264423135305), we get a palindrome (664795747597466).

The spelling of 503531324462161 in words is "five hundred three trillion, five hundred thirty-one billion, three hundred twenty-four million, four hundred sixty-two thousand, one hundred sixty-one".