73418521 has 8 divisors (see below), whose sum is σ = 80157888. Its totient is φ = 66690000.

The previous prime is 73418491. The next prime is 73418567. The reversal of 73418521 is 12581437.

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

It is a cyclic number.

It is not a de Polignac number, because 73418521 - 2¹³ = 73410329 is a prime.

It is a super-4 number, since 4×73418521⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73418321) 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, 19156 + ... + 22666.

It is an arithmetic number, because the mean of its divisors is an integer number (10019736).

Almost surely, 2^73418521 is an apocalyptic number.

It is an amenable number.

73418521 is a deficient number, since it is larger than the sum of its proper divisors (6739367).

73418521 is a wasteful number, since it uses less digits than its factorization.

73418521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423.

The product of its digits is 6720, while the sum is 31.

The square root of 73418521 is about 8568.4608302775. The cubic root of 73418521 is about 418.7310927529.

Adding to 73418521 its reverse (12581437), we get a palindrome (85999958).

The spelling of 73418521 in words is "seventy-three million, four hundred eighteen thousand, five hundred twenty-one".