815045453 has 2 divisors, whose sum is σ = 815045454. Its totient is φ = 815045452.

The previous prime is 815045447. The next prime is 815045513. The reversal of 815045453 is 354540518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 814931209 + 114244 = 28547^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 815045453 - 2⁸ = 815045197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815041453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407522726 + 407522727.

It is an arithmetic number, because the mean of its divisors is an integer number (407522727).

Almost surely, 2^815045453 is an apocalyptic number.

It is an amenable number.

815045453 is a deficient number, since it is larger than the sum of its proper divisors (1).

815045453 is an equidigital number, since it uses as much as digits as its factorization.

815045453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 815045453 is about 28549.0009107149. Note that the first 3 decimals coincide. The cubic root of 815045453 is about 934.1012278957.

The spelling of 815045453 in words is "eight hundred fifteen million, forty-five thousand, four hundred fifty-three".