221453204 has 12 divisors (see below), whose sum is σ = 442906464. Its totient is φ = 94908504.

The previous prime is 221453191. The next prime is 221453317. The reversal of 221453204 is 402354122.

It is a happy number.

221453204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

221453204 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 221453204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3954494 + ... + 3954549.

It is an arithmetic number, because the mean of its divisors is an integer number (36908872).

Almost surely, 2^221453204 is an apocalyptic number.

It is an amenable number.

221453204 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221453204 is a wasteful number, since it uses less digits than its factorization.

221453204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909054 (or 7909052 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 221453204 is about 14881.3038407258. The cubic root of 221453204 is about 605.0073573315.

The spelling of 221453204 in words is "two hundred twenty-one million, four hundred fifty-three thousand, two hundred four".