47128225 has 9 divisors (see below), whose sum is σ = 58481593. Its totient is φ = 37675120.

The previous prime is 47128187. The next prime is 47128231. The reversal of 47128225 is 52282174.

It is a happy number.

The square root of 47128225 is 6865.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 12271009 + 34857216 = 3503^2 + 5904^2 .

It is not a de Polignac number, because 47128225 - 2²¹ = 45031073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33639 + ... + 35011.

Almost surely, 2^47128225 is an apocalyptic number.

47128225 is the 6865-th square number.

47128225 is the 3433-rd centered octagonal number.

It is an amenable number.

47128225 is a deficient number, since it is larger than the sum of its proper divisors (11353368).

47128225 is an frugal number, since it uses more digits than its factorization.

47128225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756 (or 1378 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The cubic root of 47128225 is about 361.2104956343.

The spelling of 47128225 in words is "forty-seven million, one hundred twenty-eight thousand, two hundred twenty-five".