2055551 has 2 divisors, whose sum is σ = 2055552. Its totient is φ = 2055550.

The previous prime is 2055541. The next prime is 2055569. The reversal of 2055551 is 1555502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2055551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2055511) 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, 1027775 + 1027776.

It is an arithmetic number, because the mean of its divisors is an integer number (1027776).

2^2055551 is an apocalyptic number.

2055551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2055551 is an equidigital number, since it uses as much as digits as its factorization.

2055551 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 2055551 is about 1433.7192891218. The cubic root of 2055551 is about 127.1479665016.

The spelling of 2055551 in words is "two million, fifty-five thousand, five hundred fifty-one".