73472521 has 8 divisors (see below), whose sum is σ = 78166944. Its totient is φ = 68819520.

The previous prime is 73472507. The next prime is 73472549. The reversal of 73472521 is 12527437.

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 73472521 - 2¹³ = 73464329 is a prime.

It is a super-2 number, since 2×73472521² = 10796422684190882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73472621) 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, 6655 + ... + 13828.

It is an arithmetic number, because the mean of its divisors is an integer number (9770868).

Almost surely, 2^73472521 is an apocalyptic number.

It is an amenable number.

73472521 is a deficient number, since it is larger than the sum of its proper divisors (4694423).

73472521 is a wasteful number, since it uses less digits than its factorization.

73472521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20711.

The product of its digits is 11760, while the sum is 31.

The square root of 73472521 is about 8571.6113420990. The cubic root of 73472521 is about 418.8337277888.

Adding to 73472521 its reverse (12527437), we get a palindrome (85999958).

The spelling of 73472521 in words is "seventy-three million, four hundred seventy-two thousand, five hundred twenty-one".