2261918 has 16 divisors (see below), whose sum is σ = 3646944. Its totient is φ = 1048320.

The previous prime is 2261911. The next prime is 2261927. The reversal of 2261918 is 8191622.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1946 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (227934).

2^2261918 is an apocalyptic number.

2261918 is a deficient number, since it is larger than the sum of its proper divisors (1385026).

2261918 is a wasteful number, since it uses less digits than its factorization.

2261918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its digits is 1728, while the sum is 29.

The square root of 2261918 is about 1503.9674198599. The cubic root of 2261918 is about 131.2680253399.

The spelling of 2261918 in words is "two million, two hundred sixty-one thousand, nine hundred eighteen".