31401443143 has 4 divisors (see below), whose sum is σ = 35887363600. Its totient is φ = 26915522688.

The previous prime is 31401443141. The next prime is 31401443167. The reversal of 31401443143 is 34134410413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34134410413 = 4783 ⋅7136611.

It is a cyclic number.

It is not a de Polignac number, because 31401443143 - 2¹ = 31401443141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401443141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2242960218 + ... + 2242960231.

It is an arithmetic number, because the mean of its divisors is an integer number (8971840900).

Almost surely, 2^31401443143 is an apocalyptic number.

31401443143 is a deficient number, since it is larger than the sum of its proper divisors (4485920457).

31401443143 is an equidigital number, since it uses as much as digits as its factorization.

31401443143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485920456.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 31401443143 its reverse (34134410413), we get a palindrome (65535853556).

The spelling of 31401443143 in words is "thirty-one billion, four hundred one million, four hundred forty-three thousand, one hundred forty-three".