2561211 has 12 divisors (see below), whose sum is σ = 3860688. Its totient is φ = 1633104.

The previous prime is 2561201. The next prime is 2561227. The reversal of 2561211 is 1121652.

It is not a de Polignac number, because 2561211 - 2⁵ = 2561179 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2561201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5980 + ... + 6393.

It is an arithmetic number, because the mean of its divisors is an integer number (321724).

2^2561211 is an apocalyptic number.

2561211 is a deficient number, since it is larger than the sum of its proper divisors (1299477).

2561211 is a wasteful number, since it uses less digits than its factorization.

2561211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12402 (or 12399 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 2561211 is about 1600.3783927559. The cubic root of 2561211 is about 136.8196429678.

Adding to 2561211 its reverse (1121652), we get a palindrome (3682863).

It can be divided in two parts, 2561 and 211, that added together give a palindrome (2772).

The spelling of 2561211 in words is "two million, five hundred sixty-one thousand, two hundred eleven".