221150132 has 72 divisors (see below), whose sum is σ = 467548200. Its totient is φ = 91203840.

The previous prime is 221150123. The next prime is 221150141. The reversal of 221150132 is 231051122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221150123) and next prime (221150141).

It can be written as a sum of positive squares in 4 ways, for example, as 22791076 + 198359056 = 4774^2 + 14084^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221150132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 633494 + ... + 633842.

It is an arithmetic number, because the mean of its divisors is an integer number (6493725).

Almost surely, 2^221150132 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 221150132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233774100).

221150132 is an abundant number, since it is smaller than the sum of its proper divisors (246398068).

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

221150132 is a wasteful number, since it uses less digits than its factorization.

221150132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 472 counting only the distinct ones).

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

The square root of 221150132 is about 14871.1173756379. The cubic root of 221150132 is about 604.7312350373.

The spelling of 221150132 in words is "two hundred twenty-one million, one hundred fifty thousand, one hundred thirty-two".