2551626 has 72 divisors (see below), whose sum is σ = 7042464. Its totient is φ = 660240.

The previous prime is 2551607. The next prime is 2551639. The reversal of 2551626 is 6261552.

It is a self number, because there is not a number n which added to its sum of digits gives 2551626.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9571 + ... + 9833.

It is an arithmetic number, because the mean of its divisors is an integer number (97812).

2^2551626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3521232).

2551626 is an abundant number, since it is smaller than the sum of its proper divisors (4490838).

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

2551626 is a wasteful number, since it uses less digits than its factorization.

2551626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 286 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2551626 is about 1597.3809814819. The cubic root of 2551626 is about 136.6487530225.

It can be divided in two parts, 255 and 1626, that added together give a palindrome (1881).

The spelling of 2551626 in words is "two million, five hundred fifty-one thousand, six hundred twenty-six".