511161 has 16 divisors (see below), whose sum is σ = 789888. Its totient is φ = 288000.

The previous prime is 511153. The next prime is 511163. The reversal of 511161 is 161115.

It is not a de Polignac number, because 511161 - 2³ = 511153 is a prime.

It is a super-2 number, since 2×511161² = 522571135842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511161.

It is not an unprimeable number, because it can be changed into a prime (511163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2001 + ... + 2241.

It is an arithmetic number, because the mean of its divisors is an integer number (49368).

2⁵¹¹¹⁶¹ is an apocalyptic number.

It is an amenable number.

511161 is a deficient number, since it is larger than the sum of its proper divisors (278727).

511161 is a wasteful number, since it uses less digits than its factorization.

511161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its digits is 30, while the sum is 15.

The square root of 511161 is about 714.9552433544. The cubic root of 511161 is about 79.9562781927.

Adding to 511161 its reverse (161115), we get a palindrome (672276).

The spelling of 511161 in words is "five hundred eleven thousand, one hundred sixty-one".