40143305431 has 4 divisors (see below), whose sum is σ = 42256111000. Its totient is φ = 38030499864.

The previous prime is 40143305429. The next prime is 40143305441. The reversal of 40143305431 is 13450334104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40143305431 - 2¹ = 40143305429 is a prime.

It is a super-2 number, since 2×40143305431² (a number of 22 digits) contains 22 as substring.

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 40143305431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143305441) 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, 1056402756 + ... + 1056402793.

It is an arithmetic number, because the mean of its divisors is an integer number (10564027750).

Almost surely, 2^40143305431 is an apocalyptic number.

40143305431 is a deficient number, since it is larger than the sum of its proper divisors (2112805569).

40143305431 is a wasteful number, since it uses less digits than its factorization.

40143305431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112805568.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 40143305431 its reverse (13450334104), we get a palindrome (53593639535).

The spelling of 40143305431 in words is "forty billion, one hundred forty-three million, three hundred five thousand, four hundred thirty-one".