221440152 has 16 divisors (see below), whose sum is σ = 553600440. Its totient is φ = 73813376.

The previous prime is 221440133. The next prime is 221440169. The reversal of 221440152 is 251044122.

It is a congruent number.

It is an unprimeable number.

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, 4613313 + ... + 4613360.

Almost surely, 2^221440152 is an apocalyptic number.

It is an amenable number.

221440152 is an abundant number, since it is smaller than the sum of its proper divisors (332160288).

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

221440152 is a wasteful number, since it uses less digits than its factorization.

221440152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226682 (or 9226678 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 221440152 is about 14880.8652974214. The cubic root of 221440152 is about 604.9954711315.

Adding to 221440152 its reverse (251044122), we get a palindrome (472484274).

The spelling of 221440152 in words is "two hundred twenty-one million, four hundred forty thousand, one hundred fifty-two".