31216706723 has 4 divisors (see below), whose sum is σ = 31327798488. Its totient is φ = 31105614960.

The previous prime is 31216706713. The next prime is 31216706779. The reversal of 31216706723 is 32760761213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32760761213 = 31051 ⋅1055063.

It is a cyclic number.

It is not a de Polignac number, because 31216706723 - 2¹⁰ = 31216705699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31216706713) 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, 55545461 + ... + 55546022.

It is an arithmetic number, because the mean of its divisors is an integer number (7831949622).

Almost surely, 2^31216706723 is an apocalyptic number.

31216706723 is a deficient number, since it is larger than the sum of its proper divisors (111091765).

31216706723 is a wasteful number, since it uses less digits than its factorization.

31216706723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111091764.

The product of its (nonzero) digits is 63504, while the sum is 38.

The spelling of 31216706723 in words is "thirty-one billion, two hundred sixteen million, seven hundred six thousand, seven hundred twenty-three".