72208025 has 6 divisors (see below), whose sum is σ = 89537982. Its totient is φ = 57766400.

The previous prime is 72208013. The next prime is 72208033. The reversal of 72208025 is 52080227.

It can be written as a sum of positive squares in 3 ways, for example, as 4129024 + 68079001 = 2032^2 + 8251^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72208025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72207985 and 72208003.

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, 1444136 + ... + 1444185.

It is an arithmetic number, because the mean of its divisors is an integer number (14922997).

Almost surely, 2^72208025 is an apocalyptic number.

It is an amenable number.

72208025 is a deficient number, since it is larger than the sum of its proper divisors (17329957).

72208025 is a wasteful number, since it uses less digits than its factorization.

72208025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888331 (or 2888326 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 72208025 is about 8497.5305236286. The cubic root of 72208025 is about 416.4170362508.

The spelling of 72208025 in words is "seventy-two million, two hundred eight thousand, twenty-five".