220959997543 has 4 divisors (see below), whose sum is σ = 223237935760. Its totient is φ = 218682059328.

The previous prime is 220959997529. The next prime is 220959997607. The reversal of 220959997543 is 345799959022.

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 220959997543 - 2²¹ = 220957900391 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 (220959997943) 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, 1138968963 + ... + 1138969156.

It is an arithmetic number, because the mean of its divisors is an integer number (55809483940).

Almost surely, 2^220959997543 is an apocalyptic number.

220959997543 is a deficient number, since it is larger than the sum of its proper divisors (2277938217).

220959997543 is an equidigital number, since it uses as much as digits as its factorization.

220959997543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277938216.

The product of its (nonzero) digits is 55112400, while the sum is 64.

The spelling of 220959997543 in words is "two hundred twenty billion, nine hundred fifty-nine million, nine hundred ninety-seven thousand, five hundred forty-three".