31129452887443 has 4 divisors (see below), whose sum is σ = 31136088887208. Its totient is φ = 31122816887680.

The previous prime is 31129452887437. The next prime is 31129452887447. The reversal of 31129452887443 is 34478825492113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31129452887443 - 2²⁵ = 31129419333011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31129452887447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3317992846 + ... + 3318002227.

It is an arithmetic number, because the mean of its divisors is an integer number (7784022221802).

Almost surely, 2^{31129452887443} is an apocalyptic number.

31129452887443 is a deficient number, since it is larger than the sum of its proper divisors (6635999765).

31129452887443 is an equidigital number, since it uses as much as digits as its factorization.

31129452887443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6635999764.

The product of its digits is 46448640, while the sum is 61.

The spelling of 31129452887443 in words is "thirty-one trillion, one hundred twenty-nine billion, four hundred fifty-two million, eight hundred eighty-seven thousand, four hundred forty-three".