241631581 has 4 divisors (see below), whose sum is σ = 241752700. Its totient is φ = 241510464.

The previous prime is 241631543. The next prime is 241631587. The reversal of 241631581 is 185136142.

241631581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 240529081 + 1102500 = 15509^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 241631581 - 2⁹ = 241631069 is a prime.

It is a super-2 number, since 2×241631581² = 116771641873119122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241631587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57516 + ... + 61573.

It is an arithmetic number, because the mean of its divisors is an integer number (60438175).

Almost surely, 2^241631581 is an apocalyptic number.

It is an amenable number.

241631581 is a deficient number, since it is larger than the sum of its proper divisors (121119).

241631581 is a wasteful number, since it uses less digits than its factorization.

241631581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121118.

The product of its digits is 5760, while the sum is 31.

The square root of 241631581 is about 15544.5032406957. The cubic root of 241631581 is about 622.8515723963.

The spelling of 241631581 in words is "two hundred forty-one million, six hundred thirty-one thousand, five hundred eighty-one".