240243131 has 4 divisors (see below), whose sum is σ = 240274152. Its totient is φ = 240212112.

The previous prime is 240243121. The next prime is 240243137. The reversal of 240243131 is 131342042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 240243131 - 2¹⁸ = 239980987 is a prime.

It is a super-2 number, since 2×240243131² = 115433523985366322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240243137) 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, 6911 + ... + 22983.

It is an arithmetic number, because the mean of its divisors is an integer number (60068538).

Almost surely, 2^240243131 is an apocalyptic number.

240243131 is a deficient number, since it is larger than the sum of its proper divisors (31021).

240243131 is a wasteful number, since it uses less digits than its factorization.

240243131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31020.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 240243131 is about 15499.7784177710. The cubic root of 240243131 is about 621.6562816305.

Adding to 240243131 its reverse (131342042), we get a palindrome (371585173).

The spelling of 240243131 in words is "two hundred forty million, two hundred forty-three thousand, one hundred thirty-one".