31227971971 has 4 divisors (see below), whose sum is σ = 35689110832. Its totient is φ = 26766833112.

The previous prime is 31227971969. The next prime is 31227972029. The reversal of 31227971971 is 17917972213.

It is a happy number.

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 31227971971 - 2¹ = 31227971969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31227977971) 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, 2230569420 + ... + 2230569433.

It is an arithmetic number, because the mean of its divisors is an integer number (8922277708).

Almost surely, 2^31227971971 is an apocalyptic number.

31227971971 is a deficient number, since it is larger than the sum of its proper divisors (4461138861).

31227971971 is an equidigital number, since it uses as much as digits as its factorization.

31227971971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4461138860.

The product of its digits is 333396, while the sum is 49.

The spelling of 31227971971 in words is "thirty-one billion, two hundred twenty-seven million, nine hundred seventy-one thousand, nine hundred seventy-one".