2551438 has 4 divisors (see below), whose sum is σ = 3827160. Its totient is φ = 1275718.

The previous prime is 2551433. The next prime is 2551441. The reversal of 2551438 is 8341552.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551433) by changing a digit.

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 as a sum of consecutive naturals, namely, 637858 + ... + 637861.

It is an arithmetic number, because the mean of its divisors is an integer number (956790).

2^2551438 is an apocalyptic number.

2551438 is a deficient number, since it is larger than the sum of its proper divisors (1275722).

2551438 is a wasteful number, since it uses less digits than its factorization.

2551438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275721.

The product of its digits is 4800, while the sum is 28.

The square root of 2551438 is about 1597.3221340731. The cubic root of 2551438 is about 136.6453969146.

It can be divided in two parts, 25514 and 38, that added together give a palindrome (25552).

The spelling of 2551438 in words is "two million, five hundred fifty-one thousand, four hundred thirty-eight".