2151144 has 64 divisors (see below), whose sum is σ = 6249600. Its totient is φ = 684288.

The previous prime is 2151139. The next prime is 2151157. The reversal of 2151144 is 4411512.

2151144 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4752 + ... + 5184.

It is an arithmetic number, because the mean of its divisors is an integer number (97650).

2^2151144 is an apocalyptic number.

2151144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2151144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3124800).

2151144 is an abundant number, since it is smaller than the sum of its proper divisors (4098456).

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

2151144 is a wasteful number, since it uses less digits than its factorization.

2151144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 461 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 2151144 is about 1466.6778787450. The cubic root of 2151144 is about 129.0891757656.

Adding to 2151144 its reverse (4411512), we get a palindrome (6562656).

The spelling of 2151144 in words is "two million, one hundred fifty-one thousand, one hundred forty-four".