2631317587 has 4 divisors (see below), whose sum is σ = 2641801176. Its totient is φ = 2620834000.

The previous prime is 2631317561. The next prime is 2631317593. The reversal of 2631317587 is 7857131362.

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 2631317587 - 2¹⁵ = 2631284819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631317527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5241418 + ... + 5241919.

It is an arithmetic number, because the mean of its divisors is an integer number (660450294).

Almost surely, 2^2631317587 is an apocalyptic number.

2631317587 is a deficient number, since it is larger than the sum of its proper divisors (10483589).

2631317587 is a wasteful number, since it uses less digits than its factorization.

2631317587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10483588.

The product of its digits is 211680, while the sum is 43.

The square root of 2631317587 is about 51296.3701152430. The cubic root of 2631317587 is about 1380.5678519656.

The spelling of 2631317587 in words is "two billion, six hundred thirty-one million, three hundred seventeen thousand, five hundred eighty-seven".