40243602203213 has 4 divisors (see below), whose sum is σ = 40243625401980. Its totient is φ = 40243579004448.

The previous prime is 40243602203179. The next prime is 40243602203219. The reversal of 40243602203213 is 31230220634204.

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 15549480818089 + 24694121385124 = 3943283^2 + 4969318^2 .

It is a cyclic number.

It is not a de Polignac number, because 40243602203213 - 2⁶ = 40243602203149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40243602203213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243602203219) 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, 8766698 + ... + 12543611.

It is an arithmetic number, because the mean of its divisors is an integer number (10060906350495).

Almost surely, 2^{40243602203213} is an apocalyptic number.

It is an amenable number.

40243602203213 is a deficient number, since it is larger than the sum of its proper divisors (23198767).

40243602203213 is a wasteful number, since it uses less digits than its factorization.

40243602203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23198766.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 40243602203213 its reverse (31230220634204), we get a palindrome (71473822837417).

The spelling of 40243602203213 in words is "forty trillion, two hundred forty-three billion, six hundred two million, two hundred three thousand, two hundred thirteen".