40342243431 has 16 divisors (see below), whose sum is σ = 65090006784. Its totient is φ = 21696668544.

The previous prime is 40342243429. The next prime is 40342243471. The reversal of 40342243431 is 13434224304.

It is a happy number.

It is not a de Polignac number, because 40342243431 - 2¹ = 40342243429 is a prime.

It is a super-2 number, since 2×40342243431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40342243471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56501385 + ... + 56502098.

It is an arithmetic number, because the mean of its divisors is an integer number (4068125424).

Almost surely, 2^40342243431 is an apocalyptic number.

40342243431 is a deficient number, since it is larger than the sum of its proper divisors (24747763353).

40342243431 is a wasteful number, since it uses less digits than its factorization.

40342243431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113003510.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 40342243431 its reverse (13434224304), we get a palindrome (53776467735).

The spelling of 40342243431 in words is "forty billion, three hundred forty-two million, two hundred forty-three thousand, four hundred thirty-one".