2220551 has 2 divisors, whose sum is σ = 2220552. Its totient is φ = 2220550.

The previous prime is 2220539. The next prime is 2220553. The reversal of 2220551 is 1550222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2220551 - 2¹⁰ = 2219527 is a prime.

It is a Sophie Germain prime.

Together with 2220553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110275 + 1110276.

It is an arithmetic number, because the mean of its divisors is an integer number (1110276).

2^2220551 is an apocalyptic number.

2220551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220551 is an equidigital number, since it uses as much as digits as its factorization.

2220551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2220551 is about 1490.1513345966. The cubic root of 2220551 is about 130.4628667659.

Adding to 2220551 its reverse (1550222), we get a palindrome (3770773).

The spelling of 2220551 in words is "two million, two hundred twenty thousand, five hundred fifty-one".