221214873 has 16 divisors (see below), whose sum is σ = 322430976. Its totient is φ = 133793040.

The previous prime is 221214857. The next prime is 221214883. The reversal of 221214873 is 378412122.

It is not a de Polignac number, because 221214873 - 2⁴ = 221214857 is a prime.

It is a super-2 number, since 2×221214873² = 97872040072812258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221214873.

It is not an unprimeable number, because it can be changed into a prime (221214883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9936 + ... + 23262.

It is an arithmetic number, because the mean of its divisors is an integer number (20151936).

Almost surely, 2^221214873 is an apocalyptic number.

It is an amenable number.

221214873 is a deficient number, since it is larger than the sum of its proper divisors (101216103).

221214873 is a wasteful number, since it uses less digits than its factorization.

221214873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13844.

The product of its digits is 5376, while the sum is 30.

The square root of 221214873 is about 14873.2939525849. The cubic root of 221214873 is about 604.7902403304.

Adding to 221214873 its reverse (378412122), we get a palindrome (599626995).

The spelling of 221214873 in words is "two hundred twenty-one million, two hundred fourteen thousand, eight hundred seventy-three".