2131404209 has 8 divisors (see below), whose sum is σ = 2329472640. Its totient is φ = 1934053200.

The previous prime is 2131404199. The next prime is 2131404217. The reversal of 2131404209 is 9024041312.

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 2131404209 - 2⁴ = 2131404193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131404239) 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 7 ways as a sum of consecutive naturals, for example, 173129 + ... + 185030.

It is an arithmetic number, because the mean of its divisors is an integer number (291184080).

Almost surely, 2^2131404209 is an apocalyptic number.

It is an amenable number.

2131404209 is a deficient number, since it is larger than the sum of its proper divisors (198068431).

2131404209 is a wasteful number, since it uses less digits than its factorization.

2131404209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358711.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2131404209 is about 46167.1334284467. The cubic root of 2131404209 is about 1286.9310313976.

The spelling of 2131404209 in words is "two billion, one hundred thirty-one million, four hundred four thousand, two hundred nine".