2145450481 has 2 divisors, whose sum is σ = 2145450482. Its totient is φ = 2145450480.

The previous prime is 2145450467. The next prime is 2145450521. The reversal of 2145450481 is 1840545412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2077536400 + 67914081 = 45580^2 + 8241^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145450481 - 2⁷ = 2145450353 is a prime.

It is a super-2 number, since 2×2145450481² = 9205915532846262722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2145450781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072725240 + 1072725241.

It is an arithmetic number, because the mean of its divisors is an integer number (1072725241).

Almost surely, 2^2145450481 is an apocalyptic number.

It is an amenable number.

2145450481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145450481 is an equidigital number, since it uses as much as digits as its factorization.

2145450481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 2145450481 is about 46319.0077721879. The cubic root of 2145450481 is about 1289.7518664220.

Adding to 2145450481 its reverse (1840545412), we get a palindrome (3985995893).

The spelling of 2145450481 in words is "two billion, one hundred forty-five million, four hundred fifty thousand, four hundred eighty-one".