2129731547987 has 8 divisors (see below), whose sum is σ = 2212991726592. Its totient is φ = 2047381317000.

The previous prime is 2129731547947. The next prime is 2129731548019. The reversal of 2129731547987 is 7897451379212.

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 2129731547987 - 2²⁰ = 2129730499411 is a prime.

It is a super-2 number, since 2×2129731547987² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129731547917) 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, 227482133 + ... + 227491494.

It is an arithmetic number, because the mean of its divisors is an integer number (276623965824).

Almost surely, 2^{2129731547987} is an apocalyptic number.

2129731547987 is a deficient number, since it is larger than the sum of its proper divisors (83260178605).

2129731547987 is a wasteful number, since it uses less digits than its factorization.

2129731547987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454973809.

The product of its digits is 53343360, while the sum is 65.

The spelling of 2129731547987 in words is "two trillion, one hundred twenty-nine billion, seven hundred thirty-one million, five hundred forty-seven thousand, nine hundred eighty-seven".