224221545 has 24 divisors (see below), whose sum is σ = 389680200. Its totient is φ = 119268096.

The previous prime is 224221531. The next prime is 224221553. The reversal of 224221545 is 545122422.

It can be written as a sum of positive squares in 4 ways, for example, as 1734489 + 222487056 = 1317^2 + 14916^2 .

It is not a de Polignac number, because 224221545 - 2¹² = 224217449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11101 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (16236675).

Almost surely, 2^224221545 is an apocalyptic number.

It is an amenable number.

224221545 is a deficient number, since it is larger than the sum of its proper divisors (165458655).

224221545 is a wasteful number, since it uses less digits than its factorization.

224221545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13209 (or 13206 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 224221545 is about 14974.0290169346. The cubic root of 224221545 is about 607.5179489692.

Adding to 224221545 its reverse (545122422), we get a palindrome (769343967).

The spelling of 224221545 in words is "two hundred twenty-four million, two hundred twenty-one thousand, five hundred forty-five".