40400432531 has 2 divisors, whose sum is σ = 40400432532. Its totient is φ = 40400432530.

The previous prime is 40400432503. The next prime is 40400432539. The reversal of 40400432531 is 13523400404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40400432531 - 2²² = 40396238227 is a prime.

It is a super-2 number, since 2×40400432531² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40400432531.

It is not a weakly prime, because it can be changed into another prime (40400432539) 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, 20200216265 + 20200216266.

It is an arithmetic number, because the mean of its divisors is an integer number (20200216266).

Almost surely, 2^40400432531 is an apocalyptic number.

40400432531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400432531 is an equidigital number, since it uses as much as digits as its factorization.

40400432531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 40400432531 its reverse (13523400404), we get a palindrome (53923832935).

The spelling of 40400432531 in words is "forty billion, four hundred million, four hundred thirty-two thousand, five hundred thirty-one".