822147725 has 18 divisors (see below), whose sum is σ = 1185907914. Its totient is φ = 563757600.

The previous prime is 822147721. The next prime is 822147749. The reversal of 822147725 is 527741228.

It can be written as a sum of positive squares in 3 ways, for example, as 866761 + 821280964 = 931^2 + 28658^2 .

It is not a de Polignac number, because 822147725 - 2² = 822147721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822147721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 334346 + ... + 336795.

It is an arithmetic number, because the mean of its divisors is an integer number (65883773).

Almost surely, 2^822147725 is an apocalyptic number.

It is an amenable number.

822147725 is a deficient number, since it is larger than the sum of its proper divisors (363760189).

822147725 is a wasteful number, since it uses less digits than its factorization.

822147725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671165 (or 671153 counting only the distinct ones).

The product of its digits is 62720, while the sum is 38.

The square root of 822147725 is about 28673.1185084567. The cubic root of 822147725 is about 936.8066244907.

The spelling of 822147725 in words is "eight hundred twenty-two million, one hundred forty-seven thousand, seven hundred twenty-five".