240613581 has 12 divisors (see below), whose sum is σ = 347395488. Its totient is φ = 148069584.

The previous prime is 240613577. The next prime is 240613601. The reversal of 240613581 is 185316042.

It is not a de Polignac number, because 240613581 - 2² = 240613577 is a prime.

It is a super-2 number, since 2×240613581² = 115789790723287122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240613501) 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 11 ways as a sum of consecutive naturals, for example, 236785 + ... + 237798.

It is an arithmetic number, because the mean of its divisors is an integer number (28949624).

Almost surely, 2^240613581 is an apocalyptic number.

It is an amenable number.

240613581 is a deficient number, since it is larger than the sum of its proper divisors (106781907).

240613581 is a wasteful number, since it uses less digits than its factorization.

240613581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474612 (or 474599 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 240613581 is about 15511.7239854247. The cubic root of 240613581 is about 621.9756446318.

The spelling of 240613581 in words is "two hundred forty million, six hundred thirteen thousand, five hundred eighty-one".