40431021131 has 2 divisors, whose sum is σ = 40431021132. Its totient is φ = 40431021130.

The previous prime is 40431021079. The next prime is 40431021151. The reversal of 40431021131 is 13112013404.

It is an a-pointer prime, because the next prime (40431021151) can be obtained adding 40431021131 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40431021131 is a prime.

It is a super-2 number, since 2×40431021131² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40431021151) 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 as a sum of consecutive naturals, namely, 20215510565 + 20215510566.

It is an arithmetic number, because the mean of its divisors is an integer number (20215510566).

Almost surely, 2^40431021131 is an apocalyptic number.

40431021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431021131 is an equidigital number, since it uses as much as digits as its factorization.

40431021131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 40431021131 its reverse (13112013404), we get a palindrome (53543034535).

The spelling of 40431021131 in words is "forty billion, four hundred thirty-one million, twenty-one thousand, one hundred thirty-one".