221175130 has 32 divisors (see below), whose sum is σ = 453195648. Its totient is φ = 76929600.

The previous prime is 221175089. The next prime is 221175161. The reversal of 221175130 is 31571122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 15 ways as a sum of consecutive naturals, for example, 41181 + ... + 46240.

It is an arithmetic number, because the mean of its divisors is an integer number (14162364).

Almost surely, 2^221175130 is an apocalyptic number.

221175130 is an abundant number, since it is smaller than the sum of its proper divisors (232020518).

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

221175130 is a wasteful number, since it uses less digits than its factorization.

221175130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87462.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 221175130 is about 14871.9578401769. The cubic root of 221175130 is about 604.7540197126.

The spelling of 221175130 in words is "two hundred twenty-one million, one hundred seventy-five thousand, one hundred thirty".