73215129 has 32 divisors (see below), whose sum is σ = 107944704. Its totient is φ = 43868160.

The previous prime is 73215127. The next prime is 73215161. The reversal of 73215129 is 92151237.

It is not a de Polignac number, because 73215129 - 2¹ = 73215127 is a prime.

It is a super-2 number, since 2×73215129² = 10720910228973282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73215096 and 73215105.

It is not an unprimeable number, because it can be changed into a prime (73215127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379257 + ... + 379449.

It is an arithmetic number, because the mean of its divisors is an integer number (3373272).

Almost surely, 2^73215129 is an apocalyptic number.

It is an amenable number.

73215129 is a deficient number, since it is larger than the sum of its proper divisors (34729575).

73215129 is a wasteful number, since it uses less digits than its factorization.

73215129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417.

The product of its digits is 3780, while the sum is 30.

The square root of 73215129 is about 8556.5839562293. The cubic root of 73215129 is about 418.3440636109.

The spelling of 73215129 in words is "seventy-three million, two hundred fifteen thousand, one hundred twenty-nine".