815080253 has 4 divisors (see below), whose sum is σ = 877778748. Its totient is φ = 752381760.

The previous prime is 815080237. The next prime is 815080313. The reversal of 815080253 is 352080518.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352080518 = 2 ⋅176040259.

It can be written as a sum of positive squares in 2 ways, for example, as 404693689 + 410386564 = 20117^2 + 20258^2 .

It is not a de Polignac number, because 815080253 - 2⁴ = 815080237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815080223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31349228 + ... + 31349253.

It is an arithmetic number, because the mean of its divisors is an integer number (219444687).

Almost surely, 2^815080253 is an apocalyptic number.

It is an amenable number.

815080253 is a deficient number, since it is larger than the sum of its proper divisors (62698495).

815080253 is a wasteful number, since it uses less digits than its factorization.

815080253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62698494.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 815080253 is about 28549.6103826304. The cubic root of 815080253 is about 934.1145221482.

The spelling of 815080253 in words is "eight hundred fifteen million, eighty thousand, two hundred fifty-three".