1220431043 has 4 divisors (see below), whose sum is σ = 1314310368. Its totient is φ = 1126551720.

The previous prime is 1220431039. The next prime is 1220431057. The reversal of 1220431043 is 3401340221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3401340221 = 17053 ⋅199457.

It is a cyclic number.

It is not a de Polignac number, because 1220431043 - 2² = 1220431039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220431243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46939643 + ... + 46939668.

It is an arithmetic number, because the mean of its divisors is an integer number (328577592).

Almost surely, 2^1220431043 is an apocalyptic number.

1220431043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1220431043 is a deficient number, since it is larger than the sum of its proper divisors (93879325).

1220431043 is an equidigital number, since it uses as much as digits as its factorization.

1220431043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93879324.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1220431043 is about 34934.6682108189. The cubic root of 1220431043 is about 1068.6555574789.

Adding to 1220431043 its reverse (3401340221), we get a palindrome (4621771264).

The spelling of 1220431043 in words is "one billion, two hundred twenty million, four hundred thirty-one thousand, forty-three".