2219551 has 2 divisors, whose sum is σ = 2219552. Its totient is φ = 2219550.

The previous prime is 2219543. The next prime is 2219557. The reversal of 2219551 is 1559122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2219551 - 2³ = 2219543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2219557) 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, 1109775 + 1109776.

It is an arithmetic number, because the mean of its divisors is an integer number (1109776).

2^2219551 is an apocalyptic number.

2219551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219551 is an equidigital number, since it uses as much as digits as its factorization.

2219551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 25.

The square root of 2219551 is about 1489.8157604214. The cubic root of 2219551 is about 130.4432796671.

The spelling of 2219551 in words is "two million, two hundred nineteen thousand, five hundred fifty-one".