2151228 has 12 divisors (see below), whose sum is σ = 5019560. Its totient is φ = 717072.

The previous prime is 2151221. The next prime is 2151241. The reversal of 2151228 is 8221512.

It is a happy number.

2151228 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

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, 89623 + ... + 89646.

2^2151228 is an apocalyptic number.

It is an amenable number.

2151228 is an abundant number, since it is smaller than the sum of its proper divisors (2868332).

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

2151228 is a wasteful number, since it uses less digits than its factorization.

2151228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179276 (or 179274 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 2151228 is about 1466.7065146102. The cubic root of 2151228 is about 129.0908560110.

The spelling of 2151228 in words is "two million, one hundred fifty-one thousand, two hundred twenty-eight".