73352421 has 6 divisors (see below), whose sum is σ = 105953510. Its totient is φ = 48901608.

The previous prime is 73352393. The next prime is 73352429. The reversal of 73352421 is 12425337.

It can be written as a sum of positive squares in only one way, i.e., 61449921 + 11902500 = 7839^2 + 3450^2 .

It is not a de Polignac number, because 73352421 - 2⁹ = 73351909 is a prime.

It is a super-2 number, since 2×73352421² = 10761155333122482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73352429) 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, 4075126 + ... + 4075143.

Almost surely, 2^73352421 is an apocalyptic number.

It is an amenable number.

73352421 is a deficient number, since it is larger than the sum of its proper divisors (32601089).

73352421 is a wasteful number, since it uses less digits than its factorization.

73352421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8150275 (or 8150272 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 73352421 is about 8564.6027928912. The cubic root of 73352421 is about 418.6053913387.

Adding to 73352421 its reverse (12425337), we get a palindrome (85777758).

The spelling of 73352421 in words is "seventy-three million, three hundred fifty-two thousand, four hundred twenty-one".