2156366 has 4 divisors (see below), whose sum is σ = 3234552. Its totient is φ = 1078182.

The previous prime is 2156359. The next prime is 2156369. The reversal of 2156366 is 6636512.

2156366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156369) 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 as a sum of consecutive naturals, namely, 539090 + ... + 539093.

It is an arithmetic number, because the mean of its divisors is an integer number (808638).

2^2156366 is an apocalyptic number.

2156366 is a deficient number, since it is larger than the sum of its proper divisors (1078186).

2156366 is a wasteful number, since it uses less digits than its factorization.

2156366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078185.

The product of its digits is 6480, while the sum is 29.

The square root of 2156366 is about 1468.4570133307. The cubic root of 2156366 is about 129.1935479721.

The spelling of 2156366 in words is "two million, one hundred fifty-six thousand, three hundred sixty-six".