73972515 has 16 divisors (see below), whose sum is σ = 118961568. Its totient is φ = 39250176.

The previous prime is 73972477. The next prime is 73972517. The reversal of 73972515 is 51527937.

It is not a de Polignac number, because 73972515 - 2⁷ = 73972387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73972517) 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 15 ways as a sum of consecutive naturals, for example, 9562 + ... + 15471.

It is an arithmetic number, because the mean of its divisors is an integer number (7435098).

Almost surely, 2^73972515 is an apocalyptic number.

73972515 is a deficient number, since it is larger than the sum of its proper divisors (44989053).

73972515 is a wasteful number, since it uses less digits than its factorization.

73972515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25238.

The product of its digits is 66150, while the sum is 39.

The square root of 73972515 is about 8600.7275855011. The cubic root of 73972515 is about 419.7816608914.

The spelling of 73972515 in words is "seventy-three million, nine hundred seventy-two thousand, five hundred fifteen".