72515307 has 8 divisors (see below), whose sum is σ = 98326080. Its totient is φ = 47524040.

The previous prime is 72515281. The next prime is 72515309. The reversal of 72515307 is 70351527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72515307 - 2¹⁶ = 72449771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72515309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204669 + ... + 205022.

It is an arithmetic number, because the mean of its divisors is an integer number (12290760).

Almost surely, 2^72515307 is an apocalyptic number.

72515307 is a deficient number, since it is larger than the sum of its proper divisors (25810773).

72515307 is a wasteful number, since it uses less digits than its factorization.

72515307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409753.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 72515307 is about 8515.5919935140. The cubic root of 72515307 is about 417.0068893386.

The spelling of 72515307 in words is "seventy-two million, five hundred fifteen thousand, three hundred seven".