5558551 has 2 divisors, whose sum is σ = 5558552. Its totient is φ = 5558550.

The previous prime is 5558537. The next prime is 5558557. The reversal of 5558551 is 1558555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5558551 - 2²¹ = 3461399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5558557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2779275 + 2779276.

It is an arithmetic number, because the mean of its divisors is an integer number (2779276).

Almost surely, 2^5558551 is an apocalyptic number.

5558551 is a deficient number, since it is larger than the sum of its proper divisors (1).

5558551 is an equidigital number, since it uses as much as digits as its factorization.

5558551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25000, while the sum is 34.

The square root of 5558551 is about 2357.6579480493. The cubic root of 5558551 is about 177.1415871583.

The spelling of 5558551 in words is "five million, five hundred fifty-eight thousand, five hundred fifty-one".