31371472673 has 16 divisors (see below), whose sum is σ = 32189245200. Its totient is φ = 30564864000.

The previous prime is 31371472669. The next prime is 31371472723. The reversal of 31371472673 is 37627417313.

It can be written as a sum of positive squares in 8 ways, for example, as 1298016784 + 30073455889 = 36028^2 + 173417^2 .

It is a cyclic number.

It is not a de Polignac number, because 31371472673 - 2² = 31371472669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31371472073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10452173 + ... + 10455173.

It is an arithmetic number, because the mean of its divisors is an integer number (2011827825).

Almost surely, 2^31371472673 is an apocalyptic number.

It is an amenable number.

31371472673 is a deficient number, since it is larger than the sum of its proper divisors (817772527).

31371472673 is a wasteful number, since it uses less digits than its factorization.

31371472673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4772.

The product of its digits is 444528, while the sum is 44.

Adding to 31371472673 its reverse (37627417313), we get a palindrome (68998889986).

The spelling of 31371472673 in words is "thirty-one billion, three hundred seventy-one million, four hundred seventy-two thousand, six hundred seventy-three".