501115161 has 32 divisors (see below), whose sum is σ = 708624000. Its totient is φ = 314565120.

The previous prime is 501115141. The next prime is 501115187. The reversal of 501115161 is 161511105.

It is a happy number.

It is not a de Polignac number, because 501115161 - 2¹⁴ = 501098777 is a prime.

It is a super-2 number, since 2×501115161² = 502232809168111842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (501115141) 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 31 ways as a sum of consecutive naturals, for example, 677730 + ... + 678468.

It is an arithmetic number, because the mean of its divisors is an integer number (22144500).

Almost surely, 2^501115161 is an apocalyptic number.

It is an amenable number.

501115161 is a deficient number, since it is larger than the sum of its proper divisors (207508839).

501115161 is a wasteful number, since it uses less digits than its factorization.

501115161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969.

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 501115161 is about 22385.6016448073. The cubic root of 501115161 is about 794.2901570935.

Adding to 501115161 its reverse (161511105), we get a palindrome (662626266).

The spelling of 501115161 in words is "five hundred one million, one hundred fifteen thousand, one hundred sixty-one".