815413226 has 4 divisors (see below), whose sum is σ = 1223119842. Its totient is φ = 407706612.

The previous prime is 815413219. The next prime is 815413229. The reversal of 815413226 is 622314518.

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

It can be written as a sum of positive squares in only one way, i.e., 507375625 + 308037601 = 22525^2 + 17551^2 .

It is a junction number, because it is equal to n+sod(n) for n = 815413192 and 815413201.

It is not an unprimeable number, because it can be changed into a prime (815413229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203853305 + ... + 203853308.

Almost surely, 2^815413226 is an apocalyptic number.

815413226 is a deficient number, since it is larger than the sum of its proper divisors (407706616).

815413226 is a wasteful number, since it uses less digits than its factorization.

815413226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407706615.

The product of its digits is 11520, while the sum is 32.

The square root of 815413226 is about 28555.4412678214. The cubic root of 815413226 is about 934.2417049498.

The spelling of 815413226 in words is "eight hundred fifteen million, four hundred thirteen thousand, two hundred twenty-six".