2151224 has 16 divisors (see below), whose sum is σ = 4072200. Its totient is φ = 1065312.

The previous prime is 2151221. The next prime is 2151241. The reversal of 2151224 is 4221512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151221) 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, 362 + ... + 2105.

2^2151224 is an apocalyptic number.

It is an amenable number.

2151224 is a deficient number, since it is larger than the sum of its proper divisors (1920976).

2151224 is a wasteful number, since it uses less digits than its factorization.

2151224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582 (or 2578 counting only the distinct ones).

The product of its digits is 160, while the sum is 17.

The square root of 2151224 is about 1466.7051510102. The cubic root of 2151224 is about 129.0907760003.

Adding to 2151224 its reverse (4221512), we get a palindrome (6372736).

The spelling of 2151224 in words is "two million, one hundred fifty-one thousand, two hundred twenty-four".