221413369 has 4 divisors (see below), whose sum is σ = 221444496. Its totient is φ = 221382244.

The previous prime is 221413343. The next prime is 221413391. The reversal of 221413369 is 963314122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221413369 - 2⁵ = 221413337 is a prime.

It is a super-2 number, since 2×221413369² = 98047759943860322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221413369.

It is not an unprimeable number, because it can be changed into a prime (221413319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942 + ... + 21064.

It is an arithmetic number, because the mean of its divisors is an integer number (55361124).

Almost surely, 2^221413369 is an apocalyptic number.

It is an amenable number.

221413369 is a deficient number, since it is larger than the sum of its proper divisors (31127).

221413369 is a wasteful number, since it uses less digits than its factorization.

221413369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31126.

The product of its digits is 7776, while the sum is 31.

The square root of 221413369 is about 14879.9653561425. The cubic root of 221413369 is about 604.9710789171.

The spelling of 221413369 in words is "two hundred twenty-one million, four hundred thirteen thousand, three hundred sixty-nine".