240344135234221 has 4 divisors (see below), whose sum is σ = 242549127300700. Its totient is φ = 238139143167744.

The previous prime is 240344135234179. The next prime is 240344135234237. The reversal of 240344135234221 is 122432531443042.

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 95836953433225 + 144507181800996 = 9789635^2 + 12021114^2 .

It is a cyclic number.

It is not a de Polignac number, because 240344135234221 - 2²⁵ = 240344101679789 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 (240344135234251) 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, 1102496033076 + ... + 1102496033293.

It is an arithmetic number, because the mean of its divisors is an integer number (60637281825175).

Almost surely, 2^{240344135234221} is an apocalyptic number.

It is an amenable number.

240344135234221 is a deficient number, since it is larger than the sum of its proper divisors (2204992066479).

240344135234221 is a wasteful number, since it uses less digits than its factorization.

240344135234221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204992066478.

The product of its (nonzero) digits is 552960, while the sum is 40.

Adding to 240344135234221 its reverse (122432531443042), we get a palindrome (362776666677263).

The spelling of 240344135234221 in words is "two hundred forty trillion, three hundred forty-four billion, one hundred thirty-five million, two hundred thirty-four thousand, two hundred twenty-one".