2551443 has 4 divisors (see below), whose sum is σ = 3401928. Its totient is φ = 1700960.

The previous prime is 2551441. The next prime is 2551457. The reversal of 2551443 is 3441552.

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

It is a cyclic number.

It is not a de Polignac number, because 2551443 - 2¹ = 2551441 is a prime.

It is a super-2 number, since 2×2551443² = 13019722764498, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2551441) 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 in 3 ways as a sum of consecutive naturals, for example, 425238 + ... + 425243.

It is an arithmetic number, because the mean of its divisors is an integer number (850482).

2^2551443 is an apocalyptic number.

2551443 is a deficient number, since it is larger than the sum of its proper divisors (850485).

2551443 is an equidigital number, since it uses as much as digits as its factorization.

2551443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850484.

The product of its digits is 2400, while the sum is 24.

The square root of 2551443 is about 1597.3236991919. The cubic root of 2551443 is about 136.6454861750.

Adding to 2551443 its reverse (3441552), we get a palindrome (5992995).

The spelling of 2551443 in words is "two million, five hundred fifty-one thousand, four hundred forty-three".