40531144523 has 2 divisors, whose sum is σ = 40531144524. Its totient is φ = 40531144522.

The previous prime is 40531144483. The next prime is 40531144579. The reversal of 40531144523 is 32544113504.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40531144523 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40531144523.

It is not a weakly prime, because it can be changed into another prime (40531144583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265572261 + 20265572262.

It is an arithmetic number, because the mean of its divisors is an integer number (20265572262).

Almost surely, 2^40531144523 is an apocalyptic number.

40531144523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40531144523 is an equidigital number, since it uses as much as digits as its factorization.

40531144523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 40531144523 in words is "forty billion, five hundred thirty-one million, one hundred forty-four thousand, five hundred twenty-three".