2131804417 has 2 divisors, whose sum is σ = 2131804418. Its totient is φ = 2131804416.

The previous prime is 2131804399. The next prime is 2131804439. The reversal of 2131804417 is 7144081312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1918527601 + 213276816 = 43801^2 + 14604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131804417 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131804457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065902208 + 1065902209.

It is an arithmetic number, because the mean of its divisors is an integer number (1065902209).

Almost surely, 2^2131804417 is an apocalyptic number.

It is an amenable number.

2131804417 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131804417 is an equidigital number, since it uses as much as digits as its factorization.

2131804417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 2131804417 is about 46171.4675638538. The cubic root of 2131804417 is about 1287.0115742090.

Adding to 2131804417 its reverse (7144081312), we get a palindrome (9275885729).

The spelling of 2131804417 in words is "two billion, one hundred thirty-one million, eight hundred four thousand, four hundred seventeen".