2511161 has 2 divisors, whose sum is σ = 2511162. Its totient is φ = 2511160.

The previous prime is 2511151. The next prime is 2511167. The reversal of 2511161 is 1611152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1771561 + 739600 = 1331^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2511161 - 2¹⁴ = 2494777 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 (2511167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1255580 + 1255581.

It is an arithmetic number, because the mean of its divisors is an integer number (1255581).

2^2511161 is an apocalyptic number.

It is an amenable number.

2511161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2511161 is an equidigital number, since it uses as much as digits as its factorization.

2511161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60, while the sum is 17.

The square root of 2511161 is about 1584.6643177658. The cubic root of 2511161 is about 135.9225517803.

Subtracting from 2511161 its reverse (1611152), we obtain a palindrome (900009).

The spelling of 2511161 in words is "two million, five hundred eleven thousand, one hundred sixty-one".