2155224 has 32 divisors (see below), whose sum is σ = 5454000. Its totient is φ = 709632.

The previous prime is 2155207. The next prime is 2155253. The reversal of 2155224 is 4225512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632 + ... + 2640.

2^2155224 is an apocalyptic number.

2155224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2155224 is an abundant number, since it is smaller than the sum of its proper divisors (3298776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155224 is a wasteful number, since it uses less digits than its factorization.

2155224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1103 counting only the distinct ones).

The product of its digits is 800, while the sum is 21.

The square root of 2155224 is about 1468.0681183106. The cubic root of 2155224 is about 129.1707372055.

The spelling of 2155224 in words is "two million, one hundred fifty-five thousand, two hundred twenty-four".