811053221 has 8 divisors (see below), whose sum is σ = 936831744. Its totient is φ = 693949120.

The previous prime is 811053211. The next prime is 811053227. The reversal of 811053221 is 122350118.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811053221 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 (811053227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168405 + ... + 2168778.

It is an arithmetic number, because the mean of its divisors is an integer number (117103968).

Almost surely, 2^811053221 is an apocalyptic number.

It is an amenable number.

811053221 is a deficient number, since it is larger than the sum of its proper divisors (125778523).

811053221 is a wasteful number, since it uses less digits than its factorization.

811053221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337211.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 811053221 is about 28478.9961375046. The cubic root of 811053221 is about 932.5736018017.

The spelling of 811053221 in words is "eight hundred eleven million, fifty-three thousand, two hundred twenty-one".