43282115221 has 2 divisors, whose sum is σ = 43282115222. Its totient is φ = 43282115220.

The previous prime is 43282115179. The next prime is 43282115251. The reversal of 43282115221 is 12251128234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43110216900 + 171898321 = 207630^2 + 13111^2 .

It is a cyclic number.

It is not a de Polignac number, because 43282115221 - 2¹⁵ = 43282082453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43282115251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21641057610 + 21641057611.

It is an arithmetic number, because the mean of its divisors is an integer number (21641057611).

Almost surely, 2^43282115221 is an apocalyptic number.

It is an amenable number.

43282115221 is a deficient number, since it is larger than the sum of its proper divisors (1).

43282115221 is an equidigital number, since it uses as much as digits as its factorization.

43282115221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 31.

The spelling of 43282115221 in words is "forty-three billion, two hundred eighty-two million, one hundred fifteen thousand, two hundred twenty-one".