221369454 has 48 divisors (see below), whose sum is σ = 488342400. Its totient is φ = 72463248.

The previous prime is 221369453. The next prime is 221369459. The reversal of 221369454 is 454963122.

It is a happy number.

221369454 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221369453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257277 + ... + 258135.

It is an arithmetic number, because the mean of its divisors is an integer number (10173800).

Almost surely, 2^221369454 is an apocalyptic number.

221369454 is an abundant number, since it is smaller than the sum of its proper divisors (266972946).

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

221369454 is a wasteful number, since it uses less digits than its factorization.

221369454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1106 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 221369454 is about 14878.4896410892. The cubic root of 221369454 is about 604.9310797341.

The spelling of 221369454 in words is "two hundred twenty-one million, three hundred sixty-nine thousand, four hundred fifty-four".