2143255481 has 2 divisors, whose sum is σ = 2143255482. Its totient is φ = 2143255480.

The previous prime is 2143255459. The next prime is 2143255511. The reversal of 2143255481 is 1845523412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1619257600 + 523997881 = 40240^2 + 22891^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143255481 - 2¹⁰ = 2143254457 is a prime.

It is a super-2 number, since 2×2143255481² = 9187088113673082722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2143255421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071627740 + 1071627741.

It is an arithmetic number, because the mean of its divisors is an integer number (1071627741).

Almost surely, 2^2143255481 is an apocalyptic number.

It is an amenable number.

2143255481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143255481 is an equidigital number, since it uses as much as digits as its factorization.

2143255481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 35.

The square root of 2143255481 is about 46295.3073323852. The cubic root of 2143255481 is about 1289.3118700383.

Adding to 2143255481 its reverse (1845523412), we get a palindrome (3988778893).

The spelling of 2143255481 in words is "two billion, one hundred forty-three million, two hundred fifty-five thousand, four hundred eighty-one".