221841954 has 24 divisors (see below), whose sum is σ = 486744960. Its totient is φ = 73010808.

The previous prime is 221841953. The next prime is 221842003. The reversal of 221841954 is 459148122.

221841954 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221841953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76582 + ... + 79425.

It is an arithmetic number, because the mean of its divisors is an integer number (20281040).

Almost surely, 2^221841954 is an apocalyptic number.

221841954 is an abundant number, since it is smaller than the sum of its proper divisors (264903006).

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

221841954 is a wasteful number, since it uses less digits than its factorization.

221841954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156094 (or 156091 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 221841954 is about 14894.3598049732. The cubic root of 221841954 is about 605.3611704090.

The spelling of 221841954 in words is "two hundred twenty-one million, eight hundred forty-one thousand, nine hundred fifty-four".