40012442431 has 32 divisors (see below), whose sum is σ = 45349254720. Its totient is φ = 35050143744.

The previous prime is 40012442429. The next prime is 40012442489. The reversal of 40012442431 is 13424421004.

It is a cyclic number.

It is not a de Polignac number, because 40012442431 - 2¹ = 40012442429 is a prime.

It is a super-2 number, since 2×40012442431² (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 = 40012442396 and 40012442405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012442531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28397055 + ... + 28398463.

It is an arithmetic number, because the mean of its divisors is an integer number (1417164210).

Almost surely, 2^40012442431 is an apocalyptic number.

40012442431 is a deficient number, since it is larger than the sum of its proper divisors (5336812289).

40012442431 is a wasteful number, since it uses less digits than its factorization.

40012442431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 40012442431 its reverse (13424421004), we get a palindrome (53436863435).

The spelling of 40012442431 in words is "forty billion, twelve million, four hundred forty-two thousand, four hundred thirty-one".