1220215443 has 16 divisors (see below), whose sum is σ = 1746925056. Its totient is φ = 754839680.

The previous prime is 1220215417. The next prime is 1220215501. The reversal of 1220215443 is 3445120221.

It is a cyclic number.

It is not a de Polignac number, because 1220215443 - 2⁵ = 1220215411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220215043) 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 in 15 ways as a sum of consecutive naturals, for example, 164871 + ... + 172112.

It is an arithmetic number, because the mean of its divisors is an integer number (109182816).

Almost surely, 2^1220215443 is an apocalyptic number.

1220215443 is a deficient number, since it is larger than the sum of its proper divisors (526709613).

1220215443 is a wasteful number, since it uses less digits than its factorization.

1220215443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337074.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1220215443 is about 34931.5823145760. The cubic root of 1220215443 is about 1068.5926246027.

Adding to 1220215443 its reverse (3445120221), we get a palindrome (4665335664).

The spelling of 1220215443 in words is "one billion, two hundred twenty million, two hundred fifteen thousand, four hundred forty-three".