2131543203987 has 8 divisors (see below), whose sum is σ = 2843028596736. Its totient is φ = 1420543306952.

The previous prime is 2131543203973. The next prime is 2131543203989. The reversal of 2131543203987 is 7893023451312.

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 2131543203987 - 2²³ = 2131534815379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131543203989) 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, 121363683 + ... + 121381244.

It is an arithmetic number, because the mean of its divisors is an integer number (355378574592).

Almost surely, 2^{2131543203987} is an apocalyptic number.

2131543203987 is a deficient number, since it is larger than the sum of its proper divisors (711485392749).

2131543203987 is a wasteful number, since it uses less digits than its factorization.

2131543203987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242747857.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 2131543203987 in words is "two trillion, one hundred thirty-one billion, five hundred forty-three million, two hundred three thousand, nine hundred eighty-seven".