73121315 has 4 divisors (see below), whose sum is σ = 87745584. Its totient is φ = 58497048.

The previous prime is 73121309. The next prime is 73121341. The reversal of 73121315 is 51312137.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73121315 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7312127 + ... + 7312136.

It is an arithmetic number, because the mean of its divisors is an integer number (21936396).

Almost surely, 2^73121315 is an apocalyptic number.

73121315 is a deficient number, since it is larger than the sum of its proper divisors (14624269).

73121315 is a wasteful number, since it uses less digits than its factorization.

73121315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14624268.

The product of its digits is 630, while the sum is 23.

The square root of 73121315 is about 8551.1002216089. The cubic root of 73121315 is about 418.1653059084.

The spelling of 73121315 in words is "seventy-three million, one hundred twenty-one thousand, three hundred fifteen".