506631161 has 6 divisors (see below), whose sum is σ = 538186350. Its totient is φ = 476829056.

The previous prime is 506631149. The next prime is 506631173. The reversal of 506631161 is 161136605.

It is an interprime number because it is at equal distance from previous prime (506631149) and next prime (506631173).

It can be written as a sum of positive squares in 3 ways, for example, as 213160000 + 293471161 = 14600^2 + 17131^2 .

It is a de Polignac number, because none of the positive numbers 2^k-506631161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506631101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 876236 + ... + 876813.

It is an arithmetic number, because the mean of its divisors is an integer number (89697725).

Almost surely, 2^506631161 is an apocalyptic number.

It is an amenable number.

506631161 is a deficient number, since it is larger than the sum of its proper divisors (31555189).

506631161 is a wasteful number, since it uses less digits than its factorization.

506631161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753083 (or 1753066 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 506631161 is about 22508.4686507101. The cubic root of 506631161 is about 797.1938984383.

Adding to 506631161 its reverse (161136605), we get a palindrome (667767766).

The spelling of 506631161 in words is "five hundred six million, six hundred thirty-one thousand, one hundred sixty-one".