221441364 has 30 divisors (see below), whose sum is σ = 578892314. Its totient is φ = 73813680.

The previous prime is 221441237. The next prime is 221441377. The reversal of 221441364 is 463144122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 114318864 + 107122500 = 10692^2 + 10350^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 341407 + ... + 342054.

Almost surely, 2^221441364 is an apocalyptic number.

It is an amenable number.

221441364 is an abundant number, since it is smaller than the sum of its proper divisors (357450950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221441364 is a wasteful number, since it uses less digits than its factorization.

221441364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683477 (or 683466 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 221441364 is about 14880.9060208040. The cubic root of 221441364 is about 604.9965748958.

Adding to 221441364 its reverse (463144122), we get a palindrome (684585486).

The spelling of 221441364 in words is "two hundred twenty-one million, four hundred forty-one thousand, three hundred sixty-four".