40255031521 has 8 divisors (see below), whose sum is σ = 40615619040. Its totient is φ = 39894520512.

The previous prime is 40255031507. The next prime is 40255031581. The reversal of 40255031521 is 12513055204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40255031521 - 2¹⁵ = 40254998753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40255031521.

It is not an unprimeable number, because it can be changed into a prime (40255031581) 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 in 7 ways as a sum of consecutive naturals, for example, 1835406 + ... + 1857208.

It is an arithmetic number, because the mean of its divisors is an integer number (5076952380).

Almost surely, 2^40255031521 is an apocalyptic number.

It is an amenable number.

40255031521 is a deficient number, since it is larger than the sum of its proper divisors (360587519).

40255031521 is a wasteful number, since it uses less digits than its factorization.

40255031521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38255.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 40255031521 its reverse (12513055204), we get a palindrome (52768086725).

The spelling of 40255031521 in words is "forty billion, two hundred fifty-five million, thirty-one thousand, five hundred twenty-one".