1043220403 has 4 divisors (see below), whose sum is σ = 1098126760. Its totient is φ = 988314048.

The previous prime is 1043220397. The next prime is 1043220433. The reversal of 1043220403 is 3040223401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040223401 = 6079 ⋅500119.

It is a cyclic number.

It is not a de Polignac number, because 1043220403 - 2¹⁷ = 1043089331 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 54906337 = 1043220403 / (1 + 0 + 4 + 3 + 2 + 2 + 0 + 4 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1043220433) 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, 27453150 + ... + 27453187.

It is an arithmetic number, because the mean of its divisors is an integer number (274531690).

Almost surely, 2^1043220403 is an apocalyptic number.

1043220403 is a deficient number, since it is larger than the sum of its proper divisors (54906357).

1043220403 is an equidigital number, since it uses as much as digits as its factorization.

1043220403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54906356.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1043220403 is about 32298.9226290909. The cubic root of 1043220403 is about 1014.2040895849.

Adding to 1043220403 its reverse (3040223401), we get a palindrome (4083443804).

The spelling of 1043220403 in words is "one billion, forty-three million, two hundred twenty thousand, four hundred three".