221980043 has 2 divisors, whose sum is σ = 221980044. Its totient is φ = 221980042.

The previous prime is 221980001. The next prime is 221980049. The reversal of 221980043 is 340089122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221980043 - 2¹⁴ = 221963659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221979988 and 221980015.

It is not a weakly prime, because it can be changed into another prime (221980049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110990021 + 110990022.

It is an arithmetic number, because the mean of its divisors is an integer number (110990022).

Almost surely, 2^221980043 is an apocalyptic number.

221980043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221980043 is an equidigital number, since it uses as much as digits as its factorization.

221980043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 221980043 is about 14898.9946976298. The cubic root of 221980043 is about 605.4867498714.

The spelling of 221980043 in words is "two hundred twenty-one million, nine hundred eighty thousand, forty-three".