1220443441 has 12 divisors (see below), whose sum is σ = 1424840628. Its totient is φ = 1042306272.

The previous prime is 1220443439. The next prime is 1220443451. The reversal of 1220443441 is 1443440221.

It can be written as a sum of positive squares in 2 ways, for example, as 629759025 + 590684416 = 25095^2 + 24304^2 .

It is not a de Polignac number, because 1220443441 - 2¹ = 1220443439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220443421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31386 + ... + 58531.

It is an arithmetic number, because the mean of its divisors is an integer number (118736719).

Almost surely, 2^1220443441 is an apocalyptic number.

It is an amenable number.

1220443441 is a deficient number, since it is larger than the sum of its proper divisors (204397187).

1220443441 is an equidigital number, since it uses as much as digits as its factorization.

1220443441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90208 (or 90201 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1220443441 is about 34934.8456558777. The cubic root of 1220443441 is about 1068.6591761858.

Adding to 1220443441 its reverse (1443440221), we get a palindrome (2663883662).

The spelling of 1220443441 in words is "one billion, two hundred twenty million, four hundred forty-three thousand, four hundred forty-one".