2551424 has 32 divisors (see below), whose sum is σ = 5255040. Its totient is φ = 1232640.

The previous prime is 2551421. The next prime is 2551429. The reversal of 2551424 is 4241552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2551424.

It is not an unprimeable number, because it can be changed into a prime (2551421) 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, 3647 + ... + 4289.

It is an arithmetic number, because the mean of its divisors is an integer number (164220).

2^2551424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2627520).

2551424 is an abundant number, since it is smaller than the sum of its proper divisors (2703616).

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

2551424 is an equidigital number, since it uses as much as digits as its factorization.

2551424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 676 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 2551424 is about 1597.3177517326. The cubic root of 2551424 is about 136.6451469851.

Adding to 2551424 its reverse (4241552), we get a palindrome (6792976).

The spelling of 2551424 in words is "two million, five hundred fifty-one thousand, four hundred twenty-four".