73000221 has 16 divisors (see below), whose sum is σ = 115075200. Its totient is φ = 40275648.

The previous prime is 73000217. The next prime is 73000237. The reversal of 73000221 is 12200037.

It is not a de Polignac number, because 73000221 - 2² = 73000217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73000201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59326 + ... + 60543.

It is an arithmetic number, because the mean of its divisors is an integer number (7192200).

Almost surely, 2^73000221 is an apocalyptic number.

It is an amenable number.

73000221 is a deficient number, since it is larger than the sum of its proper divisors (42074979).

73000221 is a wasteful number, since it uses less digits than its factorization.

73000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119908.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 73000221 is about 8544.0166783545. The cubic root of 73000221 is about 417.9343413884.

Adding to 73000221 its reverse (12200037), we get a palindrome (85200258).

The spelling of 73000221 in words is "seventy-three million, two hundred twenty-one", and thus it is an aban number.