31491538353142 has 16 divisors (see below), whose sum is σ = 54102599524512. Its totient is φ = 13467097278720.

The previous prime is 31491538353097. The next prime is 31491538353173. The reversal of 31491538353142 is 24135383519413.

It is a self number, because there is not a number n which added to its sum of digits gives 31491538353142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2439685083 + ... + 2439697990.

It is an arithmetic number, because the mean of its divisors is an integer number (3381412470282).

Almost surely, 2^{31491538353142} is an apocalyptic number.

31491538353142 is a deficient number, since it is larger than the sum of its proper divisors (22611061171370).

31491538353142 is a wasteful number, since it uses less digits than its factorization.

31491538353142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879383543.

The product of its digits is 4665600, while the sum is 52.

The spelling of 31491538353142 in words is "thirty-one trillion, four hundred ninety-one billion, five hundred thirty-eight million, three hundred fifty-three thousand, one hundred forty-two".