241561819 has 4 divisors (see below), whose sum is σ = 242333896. Its totient is φ = 240789744.

The previous prime is 241561781. The next prime is 241561849. The reversal of 241561819 is 918165142.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918165142 = 2 ⋅459082571.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-241561819 is a prime.

It is a super-2 number, since 2×241561819² = 116704224797177522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (241561849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385569 + ... + 386194.

It is an arithmetic number, because the mean of its divisors is an integer number (60583474).

Almost surely, 2^241561819 is an apocalyptic number.

241561819 is a deficient number, since it is larger than the sum of its proper divisors (772077).

241561819 is an equidigital number, since it uses as much as digits as its factorization.

241561819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772076.

The product of its digits is 17280, while the sum is 37.

The square root of 241561819 is about 15542.2591343730. The cubic root of 241561819 is about 622.7916249982.

The spelling of 241561819 in words is "two hundred forty-one million, five hundred sixty-one thousand, eight hundred nineteen".