72755225 has 6 divisors (see below), whose sum is σ = 90216510. Its totient is φ = 58204160.

The previous prime is 72755203. The next prime is 72755251. The reversal of 72755225 is 52255727.

It can be written as a sum of positive squares in 3 ways, for example, as 22174681 + 50580544 = 4709^2 + 7112^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72755225 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1455080 + ... + 1455129.

It is an arithmetic number, because the mean of its divisors is an integer number (15036085).

Almost surely, 2^72755225 is an apocalyptic number.

It is an amenable number.

72755225 is a deficient number, since it is larger than the sum of its proper divisors (17461285).

72755225 is a wasteful number, since it uses less digits than its factorization.

72755225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910219 (or 2910214 counting only the distinct ones).

The product of its digits is 49000, while the sum is 35.

The square root of 72755225 is about 8529.6673440410. The cubic root of 72755225 is about 417.4662743025.

The spelling of 72755225 in words is "seventy-two million, seven hundred fifty-five thousand, two hundred twenty-five".