2550551 has 2 divisors, whose sum is σ = 2550552. Its totient is φ = 2550550.

The previous prime is 2550497. The next prime is 2550563. The reversal of 2550551 is 1550552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2550551 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2555551) 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, 1275275 + 1275276.

It is an arithmetic number, because the mean of its divisors is an integer number (1275276).

2^2550551 is an apocalyptic number.

2550551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2550551 is an equidigital number, since it uses as much as digits as its factorization.

2550551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 2550551 is about 1597.0444577406. The cubic root of 2550551 is about 136.6295602877.

Subtracting from 2550551 its reverse (1550552), we obtain a palindrome (999999).

The spelling of 2550551 in words is "two million, five hundred fifty thousand, five hundred fifty-one".