73223550 has 144 divisors (see below), whose sum is σ = 211236480. Its totient is φ = 18144000.

The previous prime is 73223537. The next prime is 73223551. The reversal of 73223550 is 5532237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73223551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 404460 + ... + 404640.

It is an arithmetic number, because the mean of its divisors is an integer number (1466920).

Almost surely, 2^73223550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73223550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105618240).

73223550 is an abundant number, since it is smaller than the sum of its proper divisors (138012930).

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

73223550 is a wasteful number, since it uses less digits than its factorization.

73223550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 73223550 is about 8557.0760192954. The cubic root of 73223550 is about 418.3601019186.

Adding to 73223550 its reverse (5532237), we get a palindrome (78755787).

The spelling of 73223550 in words is "seventy-three million, two hundred twenty-three thousand, five hundred fifty".