31241540145 has 16 divisors (see below), whose sum is σ = 50245466112. Its totient is φ = 16575820800.

The previous prime is 31241540041. The next prime is 31241540147. The reversal of 31241540145 is 54104514213.

It is not a de Polignac number, because 31241540145 - 2²⁸ = 30973104689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31241540147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5392881 + ... + 5398670.

It is an arithmetic number, because the mean of its divisors is an integer number (3140341632).

Almost surely, 2^31241540145 is an apocalyptic number.

It is an amenable number.

31241540145 is a deficient number, since it is larger than the sum of its proper divisors (19003925967).

31241540145 is a wasteful number, since it uses less digits than its factorization.

31241540145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10791752.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 31241540145 in words is "thirty-one billion, two hundred forty-one million, five hundred forty thousand, one hundred forty-five".