221113385 has 8 divisors (see below), whose sum is σ = 265481160. Its totient is φ = 176793984.

The previous prime is 221113381. The next prime is 221113397. The reversal of 221113385 is 583311122.

It can be written as a sum of positive squares in 4 ways, for example, as 56145049 + 164968336 = 7493^2 + 12844^2 .

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 221113385 - 2² = 221113381 is a prime.

It is a super-2 number, since 2×221113385² = 97782258052316450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221113381) 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, 1130 + ... + 21059.

It is an arithmetic number, because the mean of its divisors is an integer number (33185145).

Almost surely, 2^221113385 is an apocalyptic number.

It is an amenable number.

221113385 is a deficient number, since it is larger than the sum of its proper divisors (44367775).

221113385 is a wasteful number, since it uses less digits than its factorization.

221113385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24187.

The product of its digits is 1440, while the sum is 26.

The square root of 221113385 is about 14869.8818085417. The cubic root of 221113385 is about 604.6977385020.

The spelling of 221113385 in words is "two hundred twenty-one million, one hundred thirteen thousand, three hundred eighty-five".