221131006 has 8 divisors (see below), whose sum is σ = 349154280. Its totient is φ = 104746248.

The previous prime is 221130977. The next prime is 221131073. The reversal of 221131006 is 600131122.

221131006 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2909581 + ... + 2909656.

It is an arithmetic number, because the mean of its divisors is an integer number (43644285).

Almost surely, 2^221131006 is an apocalyptic number.

221131006 is a deficient number, since it is larger than the sum of its proper divisors (128023274).

221131006 is a wasteful number, since it uses less digits than its factorization.

221131006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5819258.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 221131006 is about 14870.4743031283. The cubic root of 221131006 is about 604.7138012953.

Adding to 221131006 its reverse (600131122), we get a palindrome (821262128).

The spelling of 221131006 in words is "two hundred twenty-one million, one hundred thirty-one thousand, six".