221723801893343 has 2 divisors, whose sum is σ = 221723801893344. Its totient is φ = 221723801893342.

The previous prime is 221723801893309. The next prime is 221723801893441. The reversal of 221723801893343 is 343398108327122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221723801893343 is a prime.

It is a super-2 number, since 2×221723801893343² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221723801892343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110861900946671 + 110861900946672.

It is an arithmetic number, because the mean of its divisors is an integer number (110861900946672).

Almost surely, 2^{221723801893343} is an apocalyptic number.

221723801893343 is a deficient number, since it is larger than the sum of its proper divisors (1).

221723801893343 is an equidigital number, since it uses as much as digits as its factorization.

221723801893343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 56.

The spelling of 221723801893343 in words is "two hundred twenty-one trillion, seven hundred twenty-three billion, eight hundred one million, eight hundred ninety-three thousand, three hundred forty-three".