2205551 has 2 divisors, whose sum is σ = 2205552. Its totient is φ = 2205550.

The previous prime is 2205547. The next prime is 2205587. The reversal of 2205551 is 1555022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2205551 - 2² = 2205547 is a prime.

It is equal to p₁₆₃₀₄₆ and since 2205551 and 163046 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2205521) 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, 1102775 + 1102776.

It is an arithmetic number, because the mean of its divisors is an integer number (1102776).

2^2205551 is an apocalyptic number.

2205551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205551 is an equidigital number, since it uses as much as digits as its factorization.

2205551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 2205551 is about 1485.1097602534. The cubic root of 2205551 is about 130.1684404353.

The spelling of 2205551 in words is "two million, two hundred five thousand, five hundred fifty-one".