221152001 has 16 divisors (see below), whose sum is σ = 270566400. Its totient is φ = 176532048.

The previous prime is 221151977. The next prime is 221152013. The reversal of 221152001 is 100251122.

It is not a de Polignac number, because 221152001 - 2⁶ = 221151937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221152081) 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 15 ways as a sum of consecutive naturals, for example, 6245 + ... + 21938.

It is an arithmetic number, because the mean of its divisors is an integer number (16910400).

Almost surely, 2^221152001 is an apocalyptic number.

It is an amenable number.

221152001 is a deficient number, since it is larger than the sum of its proper divisors (49414399).

221152001 is a wasteful number, since it uses less digits than its factorization.

221152001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28268.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 221152001 is about 14871.1802154368. The cubic root of 221152001 is about 604.7329386153.

The spelling of 221152001 in words is "two hundred twenty-one million, one hundred fifty-two thousand, one".