2131923166499 has 24 divisors (see below), whose sum is σ = 2488853927088. Its totient is φ = 1820837491200.

The previous prime is 2131923166447. The next prime is 2131923166543. The reversal of 2131923166499 is 9946613291312.

It is a de Polignac number, because none of the positive numbers 2^k-2131923166499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131923166099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42934124 + ... + 42983750.

It is an arithmetic number, because the mean of its divisors is an integer number (103702246962).

Almost surely, 2^{2131923166499} is an apocalyptic number.

2131923166499 is a deficient number, since it is larger than the sum of its proper divisors (356930760589).

2131923166499 is a wasteful number, since it uses less digits than its factorization.

2131923166499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52755 (or 52748 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 56.

The spelling of 2131923166499 in words is "two trillion, one hundred thirty-one billion, nine hundred twenty-three million, one hundred sixty-six thousand, four hundred ninety-nine".