815292241 has 4 divisors (see below), whose sum is σ = 816070500. Its totient is φ = 814513984.

The previous prime is 815292211. The next prime is 815292253. The reversal of 815292241 is 142292518.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 778131025 + 37161216 = 27895^2 + 6096^2 .

It is a cyclic number.

It is not a de Polignac number, because 815292241 - 2⁵ = 815292209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 815292197 and 815292206.

It is not an unprimeable number, because it can be changed into a prime (815292211) 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, 387556 + ... + 389653.

It is an arithmetic number, because the mean of its divisors is an integer number (204017625).

Almost surely, 2^815292241 is an apocalyptic number.

It is an amenable number.

815292241 is a deficient number, since it is larger than the sum of its proper divisors (778259).

815292241 is a wasteful number, since it uses less digits than its factorization.

815292241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778258.

The product of its digits is 11520, while the sum is 34.

The square root of 815292241 is about 28553.3227663612. The cubic root of 815292241 is about 934.1954973666.

The spelling of 815292241 in words is "eight hundred fifteen million, two hundred ninety-two thousand, two hundred forty-one".