821051226 has 24 divisors (see below), whose sum is σ = 1781275860. Its totient is φ = 273325056.

The previous prime is 821051207. The next prime is 821051233. The reversal of 821051226 is 622150128.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 744471225 + 76580001 = 27285^2 + 8751^2 .

It is a super-2 number, since 2×821051226² = 1348250231432206152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 821051226.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15591 + ... + 43418.

Almost surely, 2^821051226 is an apocalyptic number.

821051226 is an abundant number, since it is smaller than the sum of its proper divisors (960224634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821051226 is a wasteful number, since it uses less digits than its factorization.

821051226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59790 (or 59787 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 821051226 is about 28653.9914497091. The cubic root of 821051226 is about 936.3899659849.

The spelling of 821051226 in words is "eight hundred twenty-one million, fifty-one thousand, two hundred twenty-six".