40231445431 has 4 divisors (see below), whose sum is σ = 41318781832. Its totient is φ = 39144109032.

The previous prime is 40231445413. The next prime is 40231445461. The reversal of 40231445431 is 13454413204.

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

It is a cyclic number.

It is not a de Polignac number, because 40231445431 - 2²³ = 40223056823 is a prime.

It is a super-2 number, since 2×40231445431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40231445393 and 40231445402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231445411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543668145 + ... + 543668218.

It is an arithmetic number, because the mean of its divisors is an integer number (10329695458).

Almost surely, 2^40231445431 is an apocalyptic number.

40231445431 is a deficient number, since it is larger than the sum of its proper divisors (1087336401).

40231445431 is a wasteful number, since it uses less digits than its factorization.

40231445431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087336400.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 40231445431 its reverse (13454413204), we get a palindrome (53685858635).

The spelling of 40231445431 in words is "forty billion, two hundred thirty-one million, four hundred forty-five thousand, four hundred thirty-one".