221089507 has 8 divisors (see below), whose sum is σ = 229214160. Its totient is φ = 213095040.

The previous prime is 221089493. The next prime is 221089513. The reversal of 221089507 is 705980122.

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

It is not a de Polignac number, because 221089507 - 2¹⁵ = 221056739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221089007) 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, 29082 + ... + 35887.

It is an arithmetic number, because the mean of its divisors is an integer number (28651770).

Almost surely, 2^221089507 is an apocalyptic number.

221089507 is a deficient number, since it is larger than the sum of its proper divisors (8124653).

221089507 is an equidigital number, since it uses as much as digits as its factorization.

221089507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65093.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 221089507 is about 14869.0788887543. The cubic root of 221089507 is about 604.6759706469.

The spelling of 221089507 in words is "two hundred twenty-one million, eighty-nine thousand, five hundred seven".