40444343131 has 2 divisors, whose sum is σ = 40444343132. Its totient is φ = 40444343130.

The previous prime is 40444343087. The next prime is 40444343189. The reversal of 40444343131 is 13134344404.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40444343131 - 2¹³ = 40444334939 is a prime.

It is a super-2 number, since 2×40444343131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40444343093 and 40444343102.

It is not a weakly prime, because it can be changed into another prime (40444343531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222171565 + 20222171566.

It is an arithmetic number, because the mean of its divisors is an integer number (20222171566).

Almost surely, 2^40444343131 is an apocalyptic number.

40444343131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444343131 is an equidigital number, since it uses as much as digits as its factorization.

40444343131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 40444343131 its reverse (13134344404), we get a palindrome (53578687535).

The spelling of 40444343131 in words is "forty billion, four hundred forty-four million, three hundred forty-three thousand, one hundred thirty-one".