40431105421513 has 4 divisors (see below), whose sum is σ = 40454090702080. Its totient is φ = 40408120140948.

The previous prime is 40431105421429. The next prime is 40431105421519. The reversal of 40431105421513 is 31512450113404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40431105421513 - 2¹⁷ = 40431105290441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40431105421519) 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, 11492637645 + ... + 11492641162.

It is an arithmetic number, because the mean of its divisors is an integer number (10113522675520).

Almost surely, 2^{40431105421513} is an apocalyptic number.

It is an amenable number.

40431105421513 is a deficient number, since it is larger than the sum of its proper divisors (22985280567).

40431105421513 is a wasteful number, since it uses less digits than its factorization.

40431105421513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22985280566.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 40431105421513 its reverse (31512450113404), we get a palindrome (71943555534917).

The spelling of 40431105421513 in words is "forty trillion, four hundred thirty-one billion, one hundred five million, four hundred twenty-one thousand, five hundred thirteen".