511160081 has 2 divisors, whose sum is σ = 511160082. Its totient is φ = 511160080.

The previous prime is 511160071. The next prime is 511160093. The reversal of 511160081 is 180061115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 433014481 + 78145600 = 20809^2 + 8840^2 .

It is a cyclic number.

It is not a de Polignac number, because 511160081 - 2²⁶ = 444051217 is a prime.

It is a super-2 number, since 2×511160081² = 522569256815853122, which contains 22 as substring.

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 (511160051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255580040 + 255580041.

It is an arithmetic number, because the mean of its divisors is an integer number (255580041).

Almost surely, 2^511160081 is an apocalyptic number.

It is an amenable number.

511160081 is a deficient number, since it is larger than the sum of its proper divisors (1).

511160081 is an equidigital number, since it uses as much as digits as its factorization.

511160081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 511160081 is about 22608.8496169089. The cubic root of 511160081 is about 799.5623027576.

The spelling of 511160081 in words is "five hundred eleven million, one hundred sixty thousand, eighty-one".