40144552531 has 2 divisors, whose sum is σ = 40144552532. Its totient is φ = 40144552530.

The previous prime is 40144552529. The next prime is 40144552571. The reversal of 40144552531 is 13525544104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40144552531 - 2¹ = 40144552529 is a prime.

It is a super-2 number, since 2×40144552531² (a number of 22 digits) contains 22 as substring.

Together with 40144552529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40144552501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20072276265 + 20072276266.

It is an arithmetic number, because the mean of its divisors is an integer number (20072276266).

Almost surely, 2^40144552531 is an apocalyptic number.

40144552531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40144552531 is an equidigital number, since it uses as much as digits as its factorization.

40144552531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 40144552531 in words is "forty billion, one hundred forty-four million, five hundred fifty-two thousand, five hundred thirty-one".