31122456847 has 4 divisors (see below), whose sum is σ = 31184827000. Its totient is φ = 31060086696.

The previous prime is 31122456821. The next prime is 31122456853. The reversal of 31122456847 is 74865422113.

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 31122456847 - 2²³ = 31114068239 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 (31122456857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31184328 + ... + 31185325.

It is an arithmetic number, because the mean of its divisors is an integer number (7796206750).

Almost surely, 2^31122456847 is an apocalyptic number.

31122456847 is a deficient number, since it is larger than the sum of its proper divisors (62370153).

31122456847 is an equidigital number, since it uses as much as digits as its factorization.

31122456847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62370152.

The product of its digits is 322560, while the sum is 43.

The spelling of 31122456847 in words is "thirty-one billion, one hundred twenty-two million, four hundred fifty-six thousand, eight hundred forty-seven".