4055551 has 2 divisors, whose sum is σ = 4055552. Its totient is φ = 4055550.

The previous prime is 4055549. The next prime is 4055561. The reversal of 4055551 is 1555504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4055551 - 2¹ = 4055549 is a prime.

Together with 4055549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4055561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027775 + 2027776.

It is an arithmetic number, because the mean of its divisors is an integer number (2027776).

Almost surely, 2^4055551 is an apocalyptic number.

4055551 is a deficient number, since it is larger than the sum of its proper divisors (1).

4055551 is an equidigital number, since it uses as much as digits as its factorization.

4055551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 4055551 is about 2013.8398645374. The cubic root of 4055551 is about 159.4715770411.

The spelling of 4055551 in words is "four million, fifty-five thousand, five hundred fifty-one".