73501321 has 4 divisors (see below), whose sum is σ = 73605700. Its totient is φ = 73396944.

The previous prime is 73501313. The next prime is 73501327. The reversal of 73501321 is 12310537.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30415225 + 43086096 = 5515^2 + 6564^2 .

It is a cyclic number.

It is not a de Polignac number, because 73501321 - 2³ = 73501313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73501292 and 73501301.

It is not an unprimeable number, because it can be changed into a prime (73501327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51126 + ... + 52543.

It is an arithmetic number, because the mean of its divisors is an integer number (18401425).

Almost surely, 2^73501321 is an apocalyptic number.

It is an amenable number.

73501321 is a deficient number, since it is larger than the sum of its proper divisors (104379).

73501321 is a wasteful number, since it uses less digits than its factorization.

73501321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104378.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 73501321 is about 8573.2911416795. The cubic root of 73501321 is about 418.8884459132. Note that the first 3 decimals are identical.

Adding to 73501321 its reverse (12310537), we get a palindrome (85811858).

The spelling of 73501321 in words is "seventy-three million, five hundred one thousand, three hundred twenty-one".