43221432352261 has 2 divisors, whose sum is σ = 43221432352262. Its totient is φ = 43221432352260.

The previous prime is 43221432352177. The next prime is 43221432352271. The reversal of 43221432352261 is 16225323412234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37855348128900 + 5366084223361 = 6152670^2 + 2316481^2 .

It is a cyclic number.

It is not a de Polignac number, because 43221432352261 - 2¹⁵ = 43221432319493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43221432352271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21610716176130 + 21610716176131.

It is an arithmetic number, because the mean of its divisors is an integer number (21610716176131).

Almost surely, 2^{43221432352261} is an apocalyptic number.

It is an amenable number.

43221432352261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43221432352261 is an equidigital number, since it uses as much as digits as its factorization.

43221432352261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 40.

Adding to 43221432352261 its reverse (16225323412234), we get a palindrome (59446755764495).

The spelling of 43221432352261 in words is "forty-three trillion, two hundred twenty-one billion, four hundred thirty-two million, three hundred fifty-two thousand, two hundred sixty-one".