221452500 has 60 divisors (see below), whose sum is σ = 645718304. Its totient is φ = 59052000.

The previous prime is 221452477. The next prime is 221452501. The reversal of 221452500 is 5254122.

It is a happy number.

221452500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221452501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7264 + ... + 22263.

Almost surely, 2^221452500 is an apocalyptic number.

221452500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221452500 is an abundant number, since it is smaller than the sum of its proper divisors (424265804).

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

221452500 is a wasteful number, since it uses less digits than its factorization.

221452500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29554 (or 29537 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 221452500 is about 14881.2801868656. The cubic root of 221452500 is about 605.0067162244.

The spelling of 221452500 in words is "two hundred twenty-one million, four hundred fifty-two thousand, five hundred".