221310152 has 16 divisors (see below), whose sum is σ = 474236160. Its totient is φ = 94847184.

The previous prime is 221310151. The next prime is 221310203. The reversal of 221310152 is 251013122.

It is a happy number.

221310152 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221310152.

It is not an unprimeable number, because it can be changed into a prime (221310151) 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, 1975928 + ... + 1976039.

It is an arithmetic number, because the mean of its divisors is an integer number (29639760).

Almost surely, 2^221310152 is an apocalyptic number.

It is an amenable number.

221310152 is an abundant number, since it is smaller than the sum of its proper divisors (252926008).

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

221310152 is a wasteful number, since it uses less digits than its factorization.

221310152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3951980 (or 3951976 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221310152 is about 14876.4966305915. The cubic root of 221310152 is about 604.8770571848.

Adding to 221310152 its reverse (251013122), we get a palindrome (472323274).

The spelling of 221310152 in words is "two hundred twenty-one million, three hundred ten thousand, one hundred fifty-two".