540243161 has 2 divisors, whose sum is σ = 540243162. Its totient is φ = 540243160.

The previous prime is 540243079. The next prime is 540243167. The reversal of 540243161 is 161342045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520706761 + 19536400 = 22819^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 540243161 - 2¹⁴ = 540226777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 540243161.

It is not a weakly prime, because it can be changed into another prime (540243167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270121580 + 270121581.

It is an arithmetic number, because the mean of its divisors is an integer number (270121581).

Almost surely, 2^540243161 is an apocalyptic number.

It is an amenable number.

540243161 is a deficient number, since it is larger than the sum of its proper divisors (1).

540243161 is an equidigital number, since it uses as much as digits as its factorization.

540243161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 540243161 is about 23243.1314800738. The cubic root of 540243161 is about 814.4474963591.

The spelling of 540243161 in words is "five hundred forty million, two hundred forty-three thousand, one hundred sixty-one".