221023331 has 8 divisors (see below), whose sum is σ = 224066304. Its totient is φ = 218001160.

The previous prime is 221023291. The next prime is 221023337. The reversal of 221023331 is 133320122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221023331 is a prime.

It is a super-2 number, since 2×221023331² = 97702625692671122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221023337) 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, 16826 + ... + 26928.

It is an arithmetic number, because the mean of its divisors is an integer number (28008288).

Almost surely, 2^221023331 is an apocalyptic number.

221023331 is a deficient number, since it is larger than the sum of its proper divisors (3042973).

221023331 is a wasteful number, since it uses less digits than its factorization.

221023331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10401.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 221023331 is about 14866.8534330570. The cubic root of 221023331 is about 604.6156345555.

Adding to 221023331 its reverse (133320122), we get a palindrome (354343453).

The spelling of 221023331 in words is "two hundred twenty-one million, twenty-three thousand, three hundred thirty-one".