502431161 has 2 divisors, whose sum is σ = 502431162. Its totient is φ = 502431160.

The previous prime is 502431101. The next prime is 502431169. The reversal of 502431161 is 161134205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254211136 + 248220025 = 15944^2 + 15755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-502431161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (502431169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251215580 + 251215581.

It is an arithmetic number, because the mean of its divisors is an integer number (251215581).

Almost surely, 2^502431161 is an apocalyptic number.

It is an amenable number.

502431161 is a deficient number, since it is larger than the sum of its proper divisors (1).

502431161 is an equidigital number, since it uses as much as digits as its factorization.

502431161 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 23.

The square root of 502431161 is about 22414.9762658808. The cubic root of 502431161 is about 794.9848557958.

Adding to 502431161 its reverse (161134205), we get a palindrome (663565366).

The spelling of 502431161 in words is "five hundred two million, four hundred thirty-one thousand, one hundred sixty-one".