2151844 has 12 divisors (see below), whose sum is σ = 3857868. Its totient is φ = 1049600.

The previous prime is 2151827. The next prime is 2151847. The reversal of 2151844 is 4481512.

It can be written as a sum of positive squares in 2 ways, for example, as 191844 + 1960000 = 438^2 + 1400^2 .

It is not an unprimeable number, because it can be changed into a prime (2151847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6397 + ... + 6724.

It is an arithmetic number, because the mean of its divisors is an integer number (321489).

2^2151844 is an apocalyptic number.

It is an amenable number.

2151844 is a deficient number, since it is larger than the sum of its proper divisors (1706024).

2151844 is a wasteful number, since it uses less digits than its factorization.

2151844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13166 (or 13164 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 2151844 is about 1466.9164938741. The cubic root of 2151844 is about 129.1031764745.

The spelling of 2151844 in words is "two million, one hundred fifty-one thousand, eight hundred forty-four".