31032144431 has 4 divisors (see below), whose sum is σ = 31037653200. Its totient is φ = 31026635664.

The previous prime is 31032144389. The next prime is 31032144443. The reversal of 31032144431 is 13444123013.

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: 13444123013 = 11657 ⋅1153309.

It is a cyclic number.

It is not a de Polignac number, because 31032144431 - 2¹⁰ = 31032143407 is a prime.

It is a super-2 number, since 2×31032144431² (a number of 22 digits) contains 22 as substring.

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 31032144431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31032144461) 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, 2745926 + ... + 2757203.

It is an arithmetic number, because the mean of its divisors is an integer number (7759413300).

Almost surely, 2^31032144431 is an apocalyptic number.

31032144431 is a deficient number, since it is larger than the sum of its proper divisors (5508769).

31032144431 is an equidigital number, since it uses as much as digits as its factorization.

31032144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508768.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31032144431 its reverse (13444123013), we get a palindrome (44476267444).

The spelling of 31032144431 in words is "thirty-one billion, thirty-two million, one hundred forty-four thousand, four hundred thirty-one".