72277225 has 12 divisors (see below), whose sum is σ = 89798940. Its totient is φ = 57708800.

The previous prime is 72277223. The next prime is 72277229. The reversal of 72277225 is 52277227.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 18386944 + 53890281 = 4288^2 + 7341^2 .

It is not a de Polignac number, because 72277225 - 2¹ = 72277223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72277223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11685 + ... + 16765.

It is an arithmetic number, because the mean of its divisors is an integer number (7483245).

Almost surely, 2^72277225 is an apocalyptic number.

It is an amenable number.

72277225 is a deficient number, since it is larger than the sum of its proper divisors (17521715).

72277225 is a wasteful number, since it uses less digits than its factorization.

72277225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660 (or 5655 counting only the distinct ones).

The product of its digits is 27440, while the sum is 34.

The square root of 72277225 is about 8501.6013197515. The cubic root of 72277225 is about 416.5500171237.

The spelling of 72277225 in words is "seventy-two million, two hundred seventy-seven thousand, two hundred twenty-five".