1220443231 has 8 divisors (see below), whose sum is σ = 1395545760. Its totient is φ = 1045529088.

The previous prime is 1220443183. The next prime is 1220443307. The reversal of 1220443231 is 1323440221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220443231 - 2¹⁵ = 1220410463 is a prime.

It is a super-2 number, since 2×1220443231² = 2978963360187438722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220440231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32926 + ... + 59371.

It is an arithmetic number, because the mean of its divisors is an integer number (174443220).

Almost surely, 2^1220443231 is an apocalyptic number.

1220443231 is a deficient number, since it is larger than the sum of its proper divisors (175102529).

1220443231 is an equidigital number, since it uses as much as digits as its factorization.

1220443231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94193.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1220443231 is about 34934.8426502825. The cubic root of 1220443231 is about 1068.6591148915.

Adding to 1220443231 its reverse (1323440221), we get a palindrome (2543883452).

The spelling of 1220443231 in words is "one billion, two hundred twenty million, four hundred forty-three thousand, two hundred thirty-one".