647642225 has 12 divisors (see below), whose sum is σ = 803525580. Its totient is φ = 517824000.

The previous prime is 647642207. The next prime is 647642243. The reversal of 647642225 is 522246746.

It is a happy number.

647642225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (647642207) and next prime (647642243).

It can be written as a sum of positive squares in 6 ways, for example, as 92416 + 647549809 = 304^2 + 25447^2 .

It is not a de Polignac number, because 647642225 - 2¹⁴ = 647625841 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46025 + ... + 58425.

It is an arithmetic number, because the mean of its divisors is an integer number (66960465).

Almost surely, 2^647642225 is an apocalyptic number.

It is an amenable number.

647642225 is a deficient number, since it is larger than the sum of its proper divisors (155883355).

647642225 is a wasteful number, since it uses less digits than its factorization.

647642225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14500 (or 14495 counting only the distinct ones).

The product of its digits is 161280, while the sum is 38.

The square root of 647642225 is about 25448.8157877729. The cubic root of 647642225 is about 865.1904533467.

The spelling of 647642225 in words is "six hundred forty-seven million, six hundred forty-two thousand, two hundred twenty-five".