31475984807 has 4 divisors (see below), whose sum is σ = 31493028336. Its totient is φ = 31458941280.

The previous prime is 31475984803. The next prime is 31475984831. The reversal of 31475984807 is 70848957413.

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 31475984807 - 2² = 31475984803 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 (31475984803) 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 3 ways as a sum of consecutive naturals, for example, 8518994 + ... + 8522687.

It is an arithmetic number, because the mean of its divisors is an integer number (7873257084).

Almost surely, 2^31475984807 is an apocalyptic number.

31475984807 is a deficient number, since it is larger than the sum of its proper divisors (17043529).

31475984807 is a wasteful number, since it uses less digits than its factorization.

31475984807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17043528.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 31475984807 in words is "thirty-one billion, four hundred seventy-five million, nine hundred eighty-four thousand, eight hundred seven".