2145320453 has 2 divisors, whose sum is σ = 2145320454. Its totient is φ = 2145320452.

The previous prime is 2145320431. The next prime is 2145320473. The reversal of 2145320453 is 3540235412.

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., 1234608769 + 910711684 = 35137^2 + 30178^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145320453 - 2⁸ = 2145320197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145320473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072660226 + 1072660227.

It is an arithmetic number, because the mean of its divisors is an integer number (1072660227).

Almost surely, 2^2145320453 is an apocalyptic number.

It is an amenable number.

2145320453 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145320453 is an equidigital number, since it uses as much as digits as its factorization.

2145320453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 2145320453 is about 46317.6041370881. The cubic root of 2145320453 is about 1289.7258101624.

Adding to 2145320453 its reverse (3540235412), we get a palindrome (5685555865).

The spelling of 2145320453 in words is "two billion, one hundred forty-five million, three hundred twenty thousand, four hundred fifty-three".