73212105 has 16 divisors (see below), whose sum is σ = 122232960. Its totient is φ = 37348608.

The previous prime is 73212103. The next prime is 73212119. The reversal of 73212105 is 50121237.

It is not a de Polignac number, because 73212105 - 2¹ = 73212103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73212103) by changing a digit.

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, 105760 + ... + 106449.

It is an arithmetic number, because the mean of its divisors is an integer number (7639560).

Almost surely, 2^73212105 is an apocalyptic number.

It is an amenable number.

73212105 is a deficient number, since it is larger than the sum of its proper divisors (49020855).

73212105 is a wasteful number, since it uses less digits than its factorization.

73212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212240.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 73212105 is about 8556.4072483724. The cubic root of 73212105 is about 418.3383039185.

The spelling of 73212105 in words is "seventy-three million, two hundred twelve thousand, one hundred five".