40012031531 has 2 divisors, whose sum is σ = 40012031532. Its totient is φ = 40012031530.

The previous prime is 40012031519. The next prime is 40012031539. The reversal of 40012031531 is 13513021004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40012031531 - 2¹⁸ = 40011769387 is a prime.

It is a super-2 number, since 2×40012031531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40012031539) 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, 20006015765 + 20006015766.

It is an arithmetic number, because the mean of its divisors is an integer number (20006015766).

Almost surely, 2^40012031531 is an apocalyptic number.

40012031531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40012031531 is an equidigital number, since it uses as much as digits as its factorization.

40012031531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 40012031531 its reverse (13513021004), we get a palindrome (53525052535).

The spelling of 40012031531 in words is "forty billion, twelve million, thirty-one thousand, five hundred thirty-one".