40121431433 has 4 divisors (see below), whose sum is σ = 40126057620. Its totient is φ = 40116805248.

The previous prime is 40121431429. The next prime is 40121431463. The reversal of 40121431433 is 33413412104.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22556435344 + 17564996089 = 150188^2 + 132533^2 .

It is a cyclic number.

It is not a de Polignac number, because 40121431433 - 2² = 40121431429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121431463) 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 3 ways as a sum of consecutive naturals, for example, 2300060 + ... + 2317437.

It is an arithmetic number, because the mean of its divisors is an integer number (10031514405).

Almost surely, 2^40121431433 is an apocalyptic number.

It is an amenable number.

40121431433 is a deficient number, since it is larger than the sum of its proper divisors (4626187).

40121431433 is an equidigital number, since it uses as much as digits as its factorization.

40121431433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626186.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 40121431433 its reverse (33413412104), we get a palindrome (73534843537).

The spelling of 40121431433 in words is "forty billion, one hundred twenty-one million, four hundred thirty-one thousand, four hundred thirty-three".