2551896 has 72 divisors (see below), whose sum is σ = 7332780. Its totient is φ = 801504.

The previous prime is 2551883. The next prime is 2551903. The reversal of 2551896 is 6981552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2551896.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38055 + ... + 38121.

2^2551896 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 2551896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3666390).

2551896 is an abundant number, since it is smaller than the sum of its proper divisors (4780884).

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

2551896 is a wasteful number, since it uses less digits than its factorization.

2551896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 95 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2551896 is about 1597.4654925851. The cubic root of 2551896 is about 136.6535726764.

The spelling of 2551896 in words is "two million, five hundred fifty-one thousand, eight hundred ninety-six".