2531611 has 2 divisors, whose sum is σ = 2531612. Its totient is φ = 2531610.

The previous prime is 2531609. The next prime is 2531629. The reversal of 2531611 is 1161352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2531611 - 2¹ = 2531609 is a prime.

Together with 2531609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2031611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265805 + 1265806.

It is an arithmetic number, because the mean of its divisors is an integer number (1265806).

2^2531611 is an apocalyptic number.

2531611 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531611 is an equidigital number, since it uses as much as digits as its factorization.

2531611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 2531611 is about 1591.1037049797. The cubic root of 2531611 is about 136.2905229745.

Adding to 2531611 its reverse (1161352), we get a palindrome (3692963).

The spelling of 2531611 in words is "two million, five hundred thirty-one thousand, six hundred eleven".