1222355143 has 4 divisors (see below), whose sum is σ = 1239099808. Its totient is φ = 1205610480.

The previous prime is 1222355129. The next prime is 1222355159. The reversal of 1222355143 is 3415532221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222355143 - 2⁵ = 1222355111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222355243) 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, 8372223 + ... + 8372368.

It is an arithmetic number, because the mean of its divisors is an integer number (309774952).

Almost surely, 2^1222355143 is an apocalyptic number.

1222355143 is a deficient number, since it is larger than the sum of its proper divisors (16744665).

1222355143 is an equidigital number, since it uses as much as digits as its factorization.

1222355143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16744664.

The product of its digits is 7200, while the sum is 28.

The square root of 1222355143 is about 34962.1959121563. The cubic root of 1222355143 is about 1069.2168674989.

Adding to 1222355143 its reverse (3415532221), we get a palindrome (4637887364).

The spelling of 1222355143 in words is "one billion, two hundred twenty-two million, three hundred fifty-five thousand, one hundred forty-three".