240340130257 has 8 divisors (see below), whose sum is σ = 255796326216. Its totient is φ = 225030438912.

The previous prime is 240340130249. The next prime is 240340130287. The reversal of 240340130257 is 752031043042.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 112916832961 + 127423297296 = 336031^2 + 356964^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240340130257 - 2³ = 240340130249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240340130287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36622768 + ... + 36629329.

It is an arithmetic number, because the mean of its divisors is an integer number (31974540777).

Almost surely, 2^240340130257 is an apocalyptic number.

It is an amenable number.

240340130257 is a deficient number, since it is larger than the sum of its proper divisors (15456195959).

240340130257 is a wasteful number, since it uses less digits than its factorization.

240340130257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73252307.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 240340130257 its reverse (752031043042), we get a palindrome (992371173299).

The spelling of 240340130257 in words is "two hundred forty billion, three hundred forty million, one hundred thirty thousand, two hundred fifty-seven".