203221152 has 72 divisors (see below), whose sum is σ = 580323744. Its totient is φ = 67457664.

The previous prime is 203221097. The next prime is 203221153. The reversal of 203221152 is 251122302.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (203221153) 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, 74403 + ... + 77085.

It is an arithmetic number, because the mean of its divisors is an integer number (8060052).

Almost surely, 2^203221152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203221152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290161872).

203221152 is an abundant number, since it is smaller than the sum of its proper divisors (377102592).

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

203221152 is a wasteful number, since it uses less digits than its factorization.

203221152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962 (or 2951 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 203221152 is about 14255.5656499488. The cubic root of 203221152 is about 587.9264103379.

Adding to 203221152 its reverse (251122302), we get a palindrome (454343454).

The spelling of 203221152 in words is "two hundred three million, two hundred twenty-one thousand, one hundred fifty-two".