73630221 has 8 divisors (see below), whose sum is σ = 112198464. Its totient is φ = 42074400.

The previous prime is 73630211. The next prime is 73630223. The reversal of 73630221 is 12203637.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73630221 - 2⁵ = 73630189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73630191 and 73630200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73630223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1753080 + ... + 1753121.

It is an arithmetic number, because the mean of its divisors is an integer number (14024808).

Almost surely, 2^73630221 is an apocalyptic number.

It is an amenable number.

73630221 is a deficient number, since it is larger than the sum of its proper divisors (38568243).

73630221 is a wasteful number, since it uses less digits than its factorization.

73630221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506211.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 73630221 is about 8580.8053817809. The cubic root of 73630221 is about 419.1331725247.

Adding to 73630221 its reverse (12203637), we get a palindrome (85833858).

The spelling of 73630221 in words is "seventy-three million, six hundred thirty thousand, two hundred twenty-one".