2220440291 has 2 divisors, whose sum is σ = 2220440292. Its totient is φ = 2220440290.

The previous prime is 2220440273. The next prime is 2220440323. The reversal of 2220440291 is 1920440222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2220440291 - 2¹⁰ = 2220439267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220440291.

It is not a weakly prime, because it can be changed into another prime (2220440231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110220145 + 1110220146.

It is an arithmetic number, because the mean of its divisors is an integer number (1110220146).

Almost surely, 2^2220440291 is an apocalyptic number.

2220440291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220440291 is an equidigital number, since it uses as much as digits as its factorization.

2220440291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2220440291 is about 47121.5480539424. The cubic root of 2220440291 is about 1304.6069858731.

The spelling of 2220440291 in words is "two billion, two hundred twenty million, four hundred forty thousand, two hundred ninety-one".