72044515 has 4 divisors (see below), whose sum is σ = 86453424. Its totient is φ = 57635608.

The previous prime is 72044507. The next prime is 72044551. The reversal of 72044515 is 51544027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51544027 = 233 ⋅221219.

It is a cyclic number.

It is not a de Polignac number, because 72044515 - 2³ = 72044507 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, 7204447 + ... + 7204456.

It is an arithmetic number, because the mean of its divisors is an integer number (21613356).

Almost surely, 2^72044515 is an apocalyptic number.

72044515 is a deficient number, since it is larger than the sum of its proper divisors (14408909).

72044515 is a wasteful number, since it uses less digits than its factorization.

72044515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14408908.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 72044515 is about 8487.9040404566. The cubic root of 72044515 is about 416.1024829949.

The spelling of 72044515 in words is "seventy-two million, forty-four thousand, five hundred fifteen".