241091991 has 32 divisors (see below), whose sum is σ = 421376000. Its totient is φ = 133319520.

The previous prime is 241091987. The next prime is 241092023. The reversal of 241091991 is 199190142.

It is not a de Polignac number, because 241091991 - 2² = 241091987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241092991) 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 31 ways as a sum of consecutive naturals, for example, 14716 + ... + 26433.

It is an arithmetic number, because the mean of its divisors is an integer number (13168000).

Almost surely, 2^241091991 is an apocalyptic number.

241091991 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

241091991 is a deficient number, since it is larger than the sum of its proper divisors (180284009).

241091991 is a wasteful number, since it uses less digits than its factorization.

241091991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41196 (or 41190 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 241091991 is about 15527.1372441928. The cubic root of 241091991 is about 622.3875947426.

The spelling of 241091991 in words is "two hundred forty-one million, ninety-one thousand, nine hundred ninety-one".