2133145481 has 2 divisors, whose sum is σ = 2133145482. Its totient is φ = 2133145480.

The previous prime is 2133145463. The next prime is 2133145493. The reversal of 2133145481 is 1845413312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1671583225 + 461562256 = 40885^2 + 21484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2133145481 is a prime.

It is a super-2 number, since 2×2133145481² = 9100619286221442722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2133145411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066572740 + 1066572741.

It is an arithmetic number, because the mean of its divisors is an integer number (1066572741).

Almost surely, 2^2133145481 is an apocalyptic number.

It is an amenable number.

2133145481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133145481 is an equidigital number, since it uses as much as digits as its factorization.

2133145481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 2133145481 is about 46185.9879292411. The cubic root of 2133145481 is about 1287.2813930664.

Adding to 2133145481 its reverse (1845413312), we get a palindrome (3978558793).

The spelling of 2133145481 in words is "two billion, one hundred thirty-three million, one hundred forty-five thousand, four hundred eighty-one".