31631144887 has 16 divisors (see below), whose sum is σ = 33259507200. Its totient is φ = 30024266272.

The previous prime is 31631144861. The next prime is 31631144917. The reversal of 31631144887 is 78844113613.

It is a cyclic number.

It is not a de Polignac number, because 31631144887 - 2⁷ = 31631144759 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 (31631144087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4187448 + ... + 4194994.

It is an arithmetic number, because the mean of its divisors is an integer number (2078719200).

Almost surely, 2^31631144887 is an apocalyptic number.

31631144887 is a deficient number, since it is larger than the sum of its proper divisors (1628362313).

31631144887 is a wasteful number, since it uses less digits than its factorization.

31631144887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8942.

The product of its digits is 387072, while the sum is 46.

The spelling of 31631144887 in words is "thirty-one billion, six hundred thirty-one million, one hundred forty-four thousand, eight hundred eighty-seven".