2229991 has 2 divisors, whose sum is σ = 2229992. Its totient is φ = 2229990.

The previous prime is 2229971. The next prime is 2230001. The reversal of 2229991 is 1999222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2229991 - 2⁵ = 2229959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2229971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114995 + 1114996.

It is an arithmetic number, because the mean of its divisors is an integer number (1114996).

2^2229991 is an apocalyptic number.

2229991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2229991 is an equidigital number, since it uses as much as digits as its factorization.

2229991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 2229991 is about 1493.3154388809. The cubic root of 2229991 is about 130.6474798578.

The spelling of 2229991 in words is "two million, two hundred twenty-nine thousand, nine hundred ninety-one".