221252150 has 120 divisors (see below), whose sum is σ = 510566280. Its totient is φ = 71124480.

The previous prime is 221252147. The next prime is 221252159. The reversal of 221252150 is 51252122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221252159) 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 59 ways as a sum of consecutive naturals, for example, 2280902 + ... + 2280998.

It is an arithmetic number, because the mean of its divisors is an integer number (4254719).

Almost surely, 2^221252150 is an apocalyptic number.

221252150 is an abundant number, since it is smaller than the sum of its proper divisors (289314130).

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

221252150 is an equidigital number, since it uses as much as digits as its factorization.

221252150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 221252150 is about 14874.5470519273. The cubic root of 221252150 is about 604.8242095647.

The spelling of 221252150 in words is "two hundred twenty-one million, two hundred fifty-two thousand, one hundred fifty".