31887000013 has 8 divisors (see below), whose sum is σ = 34797361536. Its totient is φ = 28978562400.

The previous prime is 31886999999. The next prime is 31887000029. The reversal of 31887000013 is 31000078813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31887000013 - 2²⁹ = 31350129101 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 (31887000913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446208 + ... + 512713.

It is an arithmetic number, because the mean of its divisors is an integer number (4349670192).

Almost surely, 2^31887000013 is an apocalyptic number.

It is an amenable number.

31887000013 is a deficient number, since it is larger than the sum of its proper divisors (2910361523).

31887000013 is a wasteful number, since it uses less digits than its factorization.

31887000013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961955.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 31887000013 its reverse (31000078813), we get a palindrome (62887078826).

The spelling of 31887000013 in words is "thirty-one billion, eight hundred eighty-seven million, thirteen", and thus it is an aban number.