72224815 has 8 divisors (see below), whose sum is σ = 93336768. Its totient is φ = 53335200.

The previous prime is 72224767. The next prime is 72224827. The reversal of 72224815 is 51842227.

It is a happy number.

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

It is not a de Polignac number, because 72224815 - 2⁹ = 72224303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555511 + ... + 555640.

It is an arithmetic number, because the mean of its divisors is an integer number (11667096).

Almost surely, 2^72224815 is an apocalyptic number.

72224815 is a deficient number, since it is larger than the sum of its proper divisors (21111953).

72224815 is a wasteful number, since it uses less digits than its factorization.

72224815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111169.

The product of its digits is 8960, while the sum is 31.

The square root of 72224815 is about 8498.5184002860. The cubic root of 72224815 is about 416.4493092113.

The spelling of 72224815 in words is "seventy-two million, two hundred twenty-four thousand, eight hundred fifteen".