43011560261 has 2 divisors, whose sum is σ = 43011560262. Its totient is φ = 43011560260.

The previous prime is 43011560177. The next prime is 43011560299. The reversal of 43011560261 is 16206511034.

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., 42952562500 + 58997761 = 207250^2 + 7681^2 .

It is a cyclic number.

It is not a de Polignac number, because 43011560261 - 2¹⁴ = 43011543877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43011560461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21505780130 + 21505780131.

It is an arithmetic number, because the mean of its divisors is an integer number (21505780131).

Almost surely, 2^43011560261 is an apocalyptic number.

It is an amenable number.

43011560261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43011560261 is an equidigital number, since it uses as much as digits as its factorization.

43011560261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 43011560261 in words is "forty-three billion, eleven million, five hundred sixty thousand, two hundred sixty-one".