73212005 has 16 divisors (see below), whose sum is σ = 89538048. Its totient is φ = 57456000.

The previous prime is 73211977. The next prime is 73212077. The reversal of 73212005 is 50021237.

It is not a de Polignac number, because 73212005 - 2¹⁰ = 73210981 is a prime.

It is a super-2 number, since 2×73212005² = 10719995352240050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95825 + ... + 96585.

It is an arithmetic number, because the mean of its divisors is an integer number (5596128).

Almost surely, 2^73212005 is an apocalyptic number.

It is an amenable number.

73212005 is a deficient number, since it is larger than the sum of its proper divisors (16326043).

73212005 is a wasteful number, since it uses less digits than its factorization.

73212005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 73212005 is about 8556.4014047963. The cubic root of 73212005 is about 418.3381134498.

The spelling of 73212005 in words is "seventy-three million, two hundred twelve thousand, five".