220042643 has 2 divisors, whose sum is σ = 220042644. Its totient is φ = 220042642.

The previous prime is 220042639. The next prime is 220042649. The reversal of 220042643 is 346240022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220042643 - 2² = 220042639 is a prime.

It is not a weakly prime, because it can be changed into another prime (220042649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110021321 + 110021322.

It is an arithmetic number, because the mean of its divisors is an integer number (110021322).

Almost surely, 2^220042643 is an apocalyptic number.

220042643 is a deficient number, since it is larger than the sum of its proper divisors (1).

220042643 is an equidigital number, since it uses as much as digits as its factorization.

220042643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 220042643 is about 14833.8343997767. The cubic root of 220042643 is about 603.7200753600.

Adding to 220042643 its reverse (346240022), we get a palindrome (566282665).

The spelling of 220042643 in words is "two hundred twenty million, forty-two thousand, six hundred forty-three".