541355561 has 2 divisors, whose sum is σ = 541355562. Its totient is φ = 541355560.

The previous prime is 541355539. The next prime is 541355569. The reversal of 541355561 is 165553145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442849936 + 98505625 = 21044^2 + 9925^2 .

It is a cyclic number.

It is not a de Polignac number, because 541355561 - 2¹⁰ = 541354537 is a prime.

It is not a weakly prime, because it can be changed into another prime (541355569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270677780 + 270677781.

It is an arithmetic number, because the mean of its divisors is an integer number (270677781).

Almost surely, 2^541355561 is an apocalyptic number.

It is an amenable number.

541355561 is a deficient number, since it is larger than the sum of its proper divisors (1).

541355561 is an equidigital number, since it uses as much as digits as its factorization.

541355561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45000, while the sum is 35.

The square root of 541355561 is about 23267.0488244642. The cubic root of 541355561 is about 815.0061153518.

The spelling of 541355561 in words is "five hundred forty-one million, three hundred fifty-five thousand, five hundred sixty-one".