72225385 has 8 divisors (see below), whose sum is σ = 86730696. Its totient is φ = 57740160.

The previous prime is 72225343. The next prime is 72225407. The reversal of 72225385 is 58352227.

It can be written as a sum of positive squares in 4 ways, for example, as 6095961 + 66129424 = 2469^2 + 8132^2 .

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

It is not a de Polignac number, because 72225385 - 2²³ = 63836777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72225385.

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, 4557 + ... + 12853.

It is an arithmetic number, because the mean of its divisors is an integer number (10841337).

Almost surely, 2^72225385 is an apocalyptic number.

It is an amenable number.

72225385 is a deficient number, since it is larger than the sum of its proper divisors (14505311).

72225385 is a wasteful number, since it uses less digits than its factorization.

72225385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10043.

The product of its digits is 33600, while the sum is 34.

The square root of 72225385 is about 8498.5519354770. The cubic root of 72225385 is about 416.4504047511.

The spelling of 72225385 in words is "seventy-two million, two hundred twenty-five thousand, three hundred eighty-five".