73363221 has 6 divisors (see below), whose sum is σ = 105969110. Its totient is φ = 48908808.

The previous prime is 73363219. The next prime is 73363229. The reversal of 73363221 is 12236337.

73363221 is a `hidden beast` number, since 7 + 3 + 3 + 632 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 1028196 = 8505^2 + 1014^2 .

It is not a de Polignac number, because 73363221 - 2¹ = 73363219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73363229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4075726 + ... + 4075743.

Almost surely, 2^73363221 is an apocalyptic number.

It is an amenable number.

73363221 is a deficient number, since it is larger than the sum of its proper divisors (32605889).

73363221 is a wasteful number, since it uses less digits than its factorization.

73363221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8151475 (or 8151472 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 73363221 is about 8565.2332717796. The cubic root of 73363221 is about 418.6259347023.

Adding to 73363221 its reverse (12236337), we get a palindrome (85599558).

The spelling of 73363221 in words is "seventy-three million, three hundred sixty-three thousand, two hundred twenty-one".