5055551 has 2 divisors, whose sum is σ = 5055552. Its totient is φ = 5055550.

The previous prime is 5055521. The next prime is 5055559. The reversal of 5055551 is 1555505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5055551 - 2⁶ = 5055487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5055551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5055559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2527775 + 2527776.

It is an arithmetic number, because the mean of its divisors is an integer number (2527776).

Almost surely, 2^5055551 is an apocalyptic number.

5055551 is a deficient number, since it is larger than the sum of its proper divisors (1).

5055551 is an equidigital number, since it uses as much as digits as its factorization.

5055551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 5055551 is about 2248.4552474977. The cubic root of 5055551 is about 171.6285362678.

The spelling of 5055551 in words is "five million, fifty-five thousand, five hundred fifty-one".