72245565 has 24 divisors (see below), whose sum is σ = 143115648. Its totient is φ = 33026400.

The previous prime is 72245549. The next prime is 72245623. The reversal of 72245565 is 56554227.

72245565 is a `hidden beast` number, since 72 + 24 + 5 + 565 = 666.

It is not a de Polignac number, because 72245565 - 2⁴ = 72245549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114361 + ... + 114990.

It is an arithmetic number, because the mean of its divisors is an integer number (5963152).

Almost surely, 2^72245565 is an apocalyptic number.

It is an amenable number.

72245565 is a deficient number, since it is larger than the sum of its proper divisors (70870083).

72245565 is a wasteful number, since it uses less digits than its factorization.

72245565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229369 (or 229366 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 72245565 is about 8499.7391136434. The cubic root of 72245565 is about 416.4891869908.

The spelling of 72245565 in words is "seventy-two million, two hundred forty-five thousand, five hundred sixty-five".