241111561 has 4 divisors (see below), whose sum is σ = 255294612. Its totient is φ = 226928512.

The previous prime is 241111547. The next prime is 241111571. The reversal of 241111561 is 165111142.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145443600 + 95667961 = 12060^2 + 9781^2 .

It is not a de Polignac number, because 241111561 - 2⁷ = 241111433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (241111511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7091500 + ... + 7091533.

It is an arithmetic number, because the mean of its divisors is an integer number (63823653).

Almost surely, 2^241111561 is an apocalyptic number.

It is an amenable number.

241111561 is a deficient number, since it is larger than the sum of its proper divisors (14183051).

241111561 is a wasteful number, since it uses less digits than its factorization.

241111561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14183050.

The product of its digits is 240, while the sum is 22.

The square root of 241111561 is about 15527.7674184024. The cubic root of 241111561 is about 622.4044345052.

The spelling of 241111561 in words is "two hundred forty-one million, one hundred eleven thousand, five hundred sixty-one".