2131199999 has 16 divisors (see below), whose sum is σ = 2273702400. Its totient is φ = 1991890944.

The previous prime is 2131199989. The next prime is 2131200011. The reversal of 2131199999 is 9999911312.

It is a cyclic number.

It is not a de Polignac number, because 2131199999 - 2⁸ = 2131199743 is a prime.

It is a Duffinian number.

2131199999 is a modest number, since divided by 99999 gives 21311 as remainder.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2131199999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131199929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520442 + ... + 524520.

It is an arithmetic number, because the mean of its divisors is an integer number (142106400).

Almost surely, 2^2131199999 is an apocalyptic number.

2131199999 is a deficient number, since it is larger than the sum of its proper divisors (142502401).

2131199999 is a wasteful number, since it uses less digits than its factorization.

2131199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462.

The product of its digits is 354294, while the sum is 53.

The square root of 2131199999 is about 46164.9217371805. The cubic root of 2131199999 is about 1286.8899297648.

The spelling of 2131199999 in words is "two billion, one hundred thirty-one million, one hundred ninety-nine thousand, nine hundred ninety-nine".