72068515 has 4 divisors (see below), whose sum is σ = 86482224. Its totient is φ = 57654808.

The previous prime is 72068467. The next prime is 72068519. The reversal of 72068515 is 51586027.

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

It is a cyclic number.

It is not a de Polignac number, because 72068515 - 2¹³ = 72060323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72068519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7206847 + ... + 7206856.

It is an arithmetic number, because the mean of its divisors is an integer number (21620556).

Almost surely, 2^72068515 is an apocalyptic number.

72068515 is a deficient number, since it is larger than the sum of its proper divisors (14413709).

72068515 is a wasteful number, since it uses less digits than its factorization.

72068515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14413708.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 72068515 is about 8489.3176993207. The cubic root of 72068515 is about 416.1486829074.

The spelling of 72068515 in words is "seventy-two million, sixty-eight thousand, five hundred fifteen".