2581211 has 2 divisors, whose sum is σ = 2581212. Its totient is φ = 2581210.

The previous prime is 2581181. The next prime is 2581213. The reversal of 2581211 is 1121852.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2581211 - 2⁶ = 2581147 is a prime.

Together with 2581213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2581213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290605 + 1290606.

It is an arithmetic number, because the mean of its divisors is an integer number (1290606).

2^2581211 is an apocalyptic number.

2581211 is the 719-th centered decagonal number.

2581211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581211 is an equidigital number, since it uses as much as digits as its factorization.

2581211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 20.

The square root of 2581211 is about 1606.6147640303. The cubic root of 2581211 is about 137.1748526642.

The spelling of 2581211 in words is "two million, five hundred eighty-one thousand, two hundred eleven".