43205050261 has 2 divisors, whose sum is σ = 43205050262. Its totient is φ = 43205050260.

The previous prime is 43205050223. The next prime is 43205050279. The reversal of 43205050261 is 16205050234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42846516036 + 358534225 = 206994^2 + 18935^2 .

It is a cyclic number.

It is not a de Polignac number, because 43205050261 - 2¹⁷ = 43204919189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43205350261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21602525130 + 21602525131.

It is an arithmetic number, because the mean of its divisors is an integer number (21602525131).

Almost surely, 2^43205050261 is an apocalyptic number.

It is an amenable number.

43205050261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43205050261 is an equidigital number, since it uses as much as digits as its factorization.

43205050261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 43205050261 in words is "forty-three billion, two hundred five million, fifty thousand, two hundred sixty-one".