72097215 has 32 divisors (see below), whose sum is σ = 117465600. Its totient is φ = 37756800.

The previous prime is 72097213. The next prime is 72097247. The reversal of 72097215 is 51279027.

It is not a de Polignac number, because 72097215 - 2¹ = 72097213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72097211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314721 + ... + 314949.

It is an arithmetic number, because the mean of its divisors is an integer number (3670800).

Almost surely, 2^72097215 is an apocalyptic number.

72097215 is a deficient number, since it is larger than the sum of its proper divisors (45368385).

72097215 is a wasteful number, since it uses less digits than its factorization.

72097215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 72097215 is about 8491.0078907041. The cubic root of 72097215 is about 416.2039168383.

The spelling of 72097215 in words is "seventy-two million, ninety-seven thousand, two hundred fifteen".