40343123324213 has 4 divisors (see below), whose sum is σ = 40379501254380. Its totient is φ = 40306745394048.

The previous prime is 40343123324173. The next prime is 40343123324249. The reversal of 40343123324213 is 31242332134304.

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 14148145005604 + 26194978318609 = 3761402^2 + 5118103^2 .

It is a cyclic number.

It is not a de Polignac number, because 40343123324213 - 2³⁶ = 40274403847477 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 (40343123324813) 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, 18188963420 + ... + 18188965637.

It is an arithmetic number, because the mean of its divisors is an integer number (10094875313595).

Almost surely, 2^{40343123324213} is an apocalyptic number.

It is an amenable number.

40343123324213 is a deficient number, since it is larger than the sum of its proper divisors (36377930167).

40343123324213 is a wasteful number, since it uses less digits than its factorization.

40343123324213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36377930166.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 40343123324213 its reverse (31242332134304), we get a palindrome (71585455458517).

The spelling of 40343123324213 in words is "forty trillion, three hundred forty-three billion, one hundred twenty-three million, three hundred twenty-four thousand, two hundred thirteen".