2151826 has 16 divisors (see below), whose sum is σ = 3598560. Its totient is φ = 959040.

The previous prime is 2151817. The next prime is 2151827. The reversal of 2151826 is 6281512.

It is a self number, because there is not a number n which added to its sum of digits gives 2151826.

It is not an unprimeable number, because it can be changed into a prime (2151827) 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, 1020 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (224910).

2^2151826 is an apocalyptic number.

2151826 is a deficient number, since it is larger than the sum of its proper divisors (1446734).

2151826 is a wasteful number, since it uses less digits than its factorization.

2151826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369.

The product of its digits is 960, while the sum is 25.

The square root of 2151826 is about 1466.9103585427. The cubic root of 2151826 is about 129.1028164943.

The spelling of 2151826 in words is "two million, one hundred fifty-one thousand, eight hundred twenty-six".