2131804481 has 2 divisors, whose sum is σ = 2131804482. Its totient is φ = 2131804480.

The previous prime is 2131804457. The next prime is 2131804487. The reversal of 2131804481 is 1844081312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2088033025 + 43771456 = 45695^2 + 6616^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131804481 - 2⁶ = 2131804417 is a prime.

It is a super-2 number, since 2×2131804481² = 9089180690423358722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2131804487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065902240 + 1065902241.

It is an arithmetic number, because the mean of its divisors is an integer number (1065902241).

Almost surely, 2^2131804481 is an apocalyptic number.

It is an amenable number.

2131804481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131804481 is an equidigital number, since it uses as much as digits as its factorization.

2131804481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 2131804481 is about 46171.4682569225. The cubic root of 2131804481 is about 1287.0115870883.

Adding to 2131804481 its reverse (1844081312), we get a palindrome (3975885793).

The spelling of 2131804481 in words is "two billion, one hundred thirty-one million, eight hundred four thousand, four hundred eighty-one".