2156266 has 32 divisors (see below), whose sum is σ = 3939840. Its totient is φ = 865536.

The previous prime is 2156251. The next prime is 2156269. The reversal of 2156266 is 6626512.

2156266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2156269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19026 + ... + 19138.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^2156266 is an apocalyptic number.

2156266 is a deficient number, since it is larger than the sum of its proper divisors (1783574).

2156266 is a wasteful number, since it uses less digits than its factorization.

2156266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198.

The product of its digits is 4320, while the sum is 28.

The square root of 2156266 is about 1468.4229635905. The cubic root of 2156266 is about 129.1915508538.

The spelling of 2156266 in words is "two million, one hundred fifty-six thousand, two hundred sixty-six".