221152331 has 8 divisors (see below), whose sum is σ = 223138800. Its totient is φ = 219174912.

The previous prime is 221152313. The next prime is 221152333. The reversal of 221152331 is 133251122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221152331 - 2²⁶ = 154043467 is a prime.

It is a super-2 number, since 2×221152331² = 97816707013467122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221152333) 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 7 ways as a sum of consecutive naturals, for example, 52595 + ... + 56643.

It is an arithmetic number, because the mean of its divisors is an integer number (27892350).

Almost surely, 2^221152331 is an apocalyptic number.

221152331 is a deficient number, since it is larger than the sum of its proper divisors (1986469).

221152331 is a wasteful number, since it uses less digits than its factorization.

221152331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525.

The product of its digits is 360, while the sum is 20.

The square root of 221152331 is about 14871.1913107189. The cubic root of 221152331 is about 604.7332394066.

The spelling of 221152331 in words is "two hundred twenty-one million, one hundred fifty-two thousand, three hundred thirty-one".