647222575 has 6 divisors (see below), whose sum is σ = 802556024. Its totient is φ = 517778040.

The previous prime is 647222573. The next prime is 647222579. The reversal of 647222575 is 575222746.

It is not a de Polignac number, because 647222575 - 2¹ = 647222573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647222573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12944427 + ... + 12944476.

Almost surely, 2^647222575 is an apocalyptic number.

647222575 is a deficient number, since it is larger than the sum of its proper divisors (155333449).

647222575 is a wasteful number, since it uses less digits than its factorization.

647222575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25888913 (or 25888908 counting only the distinct ones).

The product of its digits is 235200, while the sum is 40.

The square root of 647222575 is about 25440.5694708275. The cubic root of 647222575 is about 865.0035417009.

The spelling of 647222575 in words is "six hundred forty-seven million, two hundred twenty-two thousand, five hundred seventy-five".