2131021587 has 16 divisors (see below), whose sum is σ = 3112244640. Its totient is φ = 1291003392.

The previous prime is 2131021579. The next prime is 2131021591. The reversal of 2131021587 is 7851201312.

It is not a de Polignac number, because 2131021587 - 2³ = 2131021579 is a prime.

It is a super-3 number, since 3×2131021587³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131021537) 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 15 ways as a sum of consecutive naturals, for example, 718948 + ... + 721905.

It is an arithmetic number, because the mean of its divisors is an integer number (194515290).

Almost surely, 2^2131021587 is an apocalyptic number.

2131021587 is a deficient number, since it is larger than the sum of its proper divisors (981223053).

2131021587 is a wasteful number, since it uses less digits than its factorization.

2131021587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440902.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 2131021587 is about 46162.9893637750. The cubic root of 2131021587 is about 1286.8540183825.

Adding to 2131021587 its reverse (7851201312), we get a palindrome (9982222899).

The spelling of 2131021587 in words is "two billion, one hundred thirty-one million, twenty-one thousand, five hundred eighty-seven".