31445159893 has 20 divisors (see below), whose sum is σ = 37026979200. Its totient is φ = 26700878904.

The previous prime is 31445159887. The next prime is 31445159953. The reversal of 31445159893 is 39895154413.

It is not a de Polignac number, because 31445159893 - 2⁵ = 31445159861 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 31445159893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31445159293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 195708 + ... + 318106.

It is an arithmetic number, because the mean of its divisors is an integer number (1851348960).

Almost surely, 2^31445159893 is an apocalyptic number.

It is an amenable number.

31445159893 is a deficient number, since it is larger than the sum of its proper divisors (5581819307).

31445159893 is an equidigital number, since it uses as much as digits as its factorization.

31445159893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122534 (or 122513 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 52.

The spelling of 31445159893 in words is "thirty-one billion, four hundred forty-five million, one hundred fifty-nine thousand, eight hundred ninety-three".