215730223573 has 2 divisors, whose sum is σ = 215730223574. Its totient is φ = 215730223572.

The previous prime is 215730223559. The next prime is 215730223589. The reversal of 215730223573 is 375322037512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215684078724 + 46144849 = 464418^2 + 6793^2 .

It is a cyclic number.

It is not a de Polignac number, because 215730223573 - 2¹³ = 215730215381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215730223543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107865111786 + 107865111787.

It is an arithmetic number, because the mean of its divisors is an integer number (107865111787).

Almost surely, 2^215730223573 is an apocalyptic number.

It is an amenable number.

215730223573 is a deficient number, since it is larger than the sum of its proper divisors (1).

215730223573 is an equidigital number, since it uses as much as digits as its factorization.

215730223573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 40.

The spelling of 215730223573 in words is "two hundred fifteen billion, seven hundred thirty million, two hundred twenty-three thousand, five hundred seventy-three".