40040431431 has 128 divisors (see below), whose sum is σ = 73500327936. Its totient is φ = 18716244480.

The previous prime is 40040431391. The next prime is 40040431433. The reversal of 40040431431 is 13413404004.

It is not a de Polignac number, because 40040431431 - 2¹⁹ = 40039907143 is a prime.

It is a super-2 number, since 2×40040431431² (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 (40040431433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 51798361 + ... + 51799133.

It is an arithmetic number, because the mean of its divisors is an integer number (574221312).

Almost surely, 2^40040431431 is an apocalyptic number.

40040431431 is a deficient number, since it is larger than the sum of its proper divisors (33459896505).

40040431431 is a wasteful number, since it uses less digits than its factorization.

40040431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 40040431431 its reverse (13413404004), we get a palindrome (53453835435).

The spelling of 40040431431 in words is "forty billion, forty million, four hundred thirty-one thousand, four hundred thirty-one".