31749542143 has 8 divisors (see below), whose sum is σ = 34653232080. Its totient is φ = 28848746880.

The previous prime is 31749542137. The next prime is 31749542179. The reversal of 31749542143 is 34124594713.

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 31749542143 - 2³³ = 23159607551 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 31749542143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31749542243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700698 + ... + 744631.

It is an arithmetic number, because the mean of its divisors is an integer number (4331654010).

Almost surely, 2^31749542143 is an apocalyptic number.

31749542143 is a deficient number, since it is larger than the sum of its proper divisors (2903689937).

31749542143 is a wasteful number, since it uses less digits than its factorization.

31749542143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447337.

The product of its digits is 362880, while the sum is 43.

The spelling of 31749542143 in words is "thirty-one billion, seven hundred forty-nine million, five hundred forty-two thousand, one hundred forty-three".