855826221 has 8 divisors (see below), whose sum is σ = 1180450080. Its totient is φ = 550876592.

The previous prime is 855826199. The next prime is 855826229. The reversal of 855826221 is 122628558.

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

It is a cyclic number.

It is not a de Polignac number, because 855826221 - 2¹⁰ = 855825197 is a prime.

It is a super-2 number, since 2×855826221² = 1464877041102281682, 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 855826221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855826229) 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, 4918455 + ... + 4918628.

It is an arithmetic number, because the mean of its divisors is an integer number (147556260).

Almost surely, 2^855826221 is an apocalyptic number.

It is an amenable number.

855826221 is a deficient number, since it is larger than the sum of its proper divisors (324623859).

855826221 is a wasteful number, since it uses less digits than its factorization.

855826221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9837115.

The product of its digits is 76800, while the sum is 39.

The square root of 855826221 is about 29254.5077039420. The cubic root of 855826221 is about 949.4276223385.

The spelling of 855826221 in words is "eight hundred fifty-five million, eight hundred twenty-six thousand, two hundred twenty-one".