240021432313 has 4 divisors (see below), whose sum is σ = 258484619428. Its totient is φ = 221558245200.

The previous prime is 240021432293. The next prime is 240021432323. The reversal of 240021432313 is 313234120042.

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 117120003984 + 122901428329 = 342228^2 + 350573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240021432313 is a prime.

It is a super-2 number, since 2×240021432313² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240021432323) 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 3 ways as a sum of consecutive naturals, for example, 9231593538 + ... + 9231593563.

It is an arithmetic number, because the mean of its divisors is an integer number (64621154857).

Almost surely, 2^240021432313 is an apocalyptic number.

It is an amenable number.

240021432313 is a deficient number, since it is larger than the sum of its proper divisors (18463187115).

240021432313 is a wasteful number, since it uses less digits than its factorization.

240021432313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18463187114.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 240021432313 its reverse (313234120042), we get a palindrome (553255552355).

The spelling of 240021432313 in words is "two hundred forty billion, twenty-one million, four hundred thirty-two thousand, three hundred thirteen".