2163256 has 8 divisors (see below), whose sum is σ = 4056120. Its totient is φ = 1081624.

The previous prime is 2163251. The next prime is 2163263. The reversal of 2163256 is 6523612.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2163256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135196 + ... + 135211.

It is an arithmetic number, because the mean of its divisors is an integer number (507015).

2^2163256 is an apocalyptic number.

It is an amenable number.

2163256 is a deficient number, since it is larger than the sum of its proper divisors (1892864).

2163256 is a wasteful number, since it uses less digits than its factorization.

2163256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270413 (or 270409 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 2163256 is about 1470.8011422351. The cubic root of 2163256 is about 129.3310010089.

Adding to 2163256 its reverse (6523612), we get a palindrome (8686868).

The spelling of 2163256 in words is "two million, one hundred sixty-three thousand, two hundred fifty-six".