221973043 has 2 divisors, whose sum is σ = 221973044. Its totient is φ = 221973042.

The previous prime is 221973041. The next prime is 221973091. The reversal of 221973043 is 340379122.

221973043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221973043 - 2¹ = 221973041 is a prime.

Together with 221973041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221972996 and 221973014.

It is not a weakly prime, because it can be changed into another prime (221973041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110986521 + 110986522.

It is an arithmetic number, because the mean of its divisors is an integer number (110986522).

Almost surely, 2^221973043 is an apocalyptic number.

221973043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221973043 is an equidigital number, since it uses as much as digits as its factorization.

221973043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 221973043 is about 14898.7597805992. The cubic root of 221973043 is about 605.4803852575.

The spelling of 221973043 in words is "two hundred twenty-one million, nine hundred seventy-three thousand, forty-three".