221616093 has 12 divisors (see below), whose sum is σ = 299538240. Its totient is φ = 145723032.

The previous prime is 221616091. The next prime is 221616103. The reversal of 221616093 is 390616122.

It is not a de Polignac number, because 221616093 - 2¹ = 221616091 is a prime.

It is a super-2 number, since 2×221616093² = 98227385353169298, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221616093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221616091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228696 + ... + 229662.

It is an arithmetic number, because the mean of its divisors is an integer number (24961520).

Almost surely, 2^221616093 is an apocalyptic number.

It is an amenable number.

221616093 is a deficient number, since it is larger than the sum of its proper divisors (77922147).

221616093 is an frugal number, since it uses more digits than its factorization.

221616093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 221616093 is about 14886.7757758354. The cubic root of 221616093 is about 605.1556578739.

The spelling of 221616093 in words is "two hundred twenty-one million, six hundred sixteen thousand, ninety-three".