221452324 has 6 divisors (see below), whose sum is σ = 387541574. Its totient is φ = 110726160.

The previous prime is 221452291. The next prime is 221452327. The reversal of 221452324 is 423254122.

It can be written as a sum of positive squares in only one way, i.e., 219988224 + 1464100 = 14832^2 + 1210^2 .

It is a super-2 number, since 2×221452324² = 98082263610001952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221452327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27681537 + ... + 27681544.

Almost surely, 2^221452324 is an apocalyptic number.

It is an amenable number.

221452324 is a deficient number, since it is larger than the sum of its proper divisors (166089250).

221452324 is a wasteful number, since it uses less digits than its factorization.

221452324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55363085 (or 55363083 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 221452324 is about 14881.2742733947. The cubic root of 221452324 is about 605.0065559474.

The spelling of 221452324 in words is "two hundred twenty-one million, four hundred fifty-two thousand, three hundred twenty-four".