846355221 has 12 divisors (see below), whose sum is σ = 1224150720. Its totient is φ = 563481000.

The previous prime is 846355187. The next prime is 846355261. The reversal of 846355221 is 122553648.

846355221 is a `hidden beast` number, since 84 + 6 + 3 + 552 + 21 = 666.

846355221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 846355221 - 2⁶ = 846355157 is a prime.

It is a super-2 number, since 2×846355221² = 1432634320227917682, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846355261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55851 + ... + 69368.

It is an arithmetic number, because the mean of its divisors is an integer number (102012560).

Almost surely, 2^846355221 is an apocalyptic number.

It is an amenable number.

846355221 is a deficient number, since it is larger than the sum of its proper divisors (377795499).

846355221 is a wasteful number, since it uses less digits than its factorization.

846355221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125976 (or 125973 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 846355221 is about 29092.1848784171. The cubic root of 846355221 is about 945.9123430557.

The spelling of 846355221 in words is "eight hundred forty-six million, three hundred fifty-five thousand, two hundred twenty-one".