1222688143 has 8 divisors (see below), whose sum is σ = 1265321600. Its totient is φ = 1180254240.

The previous prime is 1222688099. The next prime is 1222688153. The reversal of 1222688143 is 3418862221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222688143 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 (1222688153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37368 + ... + 61981.

It is an arithmetic number, because the mean of its divisors is an integer number (158165200).

Almost surely, 2^1222688143 is an apocalyptic number.

1222688143 is a deficient number, since it is larger than the sum of its proper divisors (42633457).

1222688143 is an equidigital number, since it uses as much as digits as its factorization.

1222688143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99777.

The product of its digits is 36864, while the sum is 37.

The square root of 1222688143 is about 34966.9578745421. The cubic root of 1222688143 is about 1069.3139524559.

The spelling of 1222688143 in words is "one billion, two hundred twenty-two million, six hundred eighty-eight thousand, one hundred forty-three".