221332245 has 8 divisors (see below), whose sum is σ = 354131616. Its totient is φ = 118043856.

The previous prime is 221332213. The next prime is 221332249. The reversal of 221332245 is 542233122.

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

It is not a de Polignac number, because 221332245 - 2⁵ = 221332213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221332249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7377727 + ... + 7377756.

It is an arithmetic number, because the mean of its divisors is an integer number (44266452).

Almost surely, 2^221332245 is an apocalyptic number.

It is an amenable number.

221332245 is a deficient number, since it is larger than the sum of its proper divisors (132799371).

221332245 is a wasteful number, since it uses less digits than its factorization.

221332245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14755491.

The product of its digits is 2880, while the sum is 24.

The square root of 221332245 is about 14877.2391591989. The cubic root of 221332245 is about 604.8971844497.

Adding to 221332245 its reverse (542233122), we get a palindrome (763565367).

The spelling of 221332245 in words is "two hundred twenty-one million, three hundred thirty-two thousand, two hundred forty-five".