221203040 has 24 divisors (see below), whose sum is σ = 522592560. Its totient is φ = 88481152.

The previous prime is 221203033. The next prime is 221203049. The reversal of 221203040 is 40302122.

221203040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221203049) 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 3 ways as a sum of consecutive naturals, for example, 691100 + ... + 691419.

It is an arithmetic number, because the mean of its divisors is an integer number (21774690).

Almost surely, 2^221203040 is an apocalyptic number.

221203040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221203040 is an abundant number, since it is smaller than the sum of its proper divisors (301389520).

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

221203040 is a wasteful number, since it uses less digits than its factorization.

221203040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382534 (or 1382526 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 221203040 is about 14872.8961537422. The cubic root of 221203040 is about 604.7794565309.

Adding to 221203040 its reverse (40302122), we get a palindrome (261505162).

The spelling of 221203040 in words is "two hundred twenty-one million, two hundred three thousand, forty".