655625224 has 8 divisors (see below), whose sum is σ = 1229297310. Its totient is φ = 327812608.

The previous prime is 655625207. The next prime is 655625227. The reversal of 655625224 is 422526556.

It can be written as a sum of positive squares in only one way, i.e., 492041124 + 163584100 = 22182^2 + 12790^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (655625227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40976569 + ... + 40976584.

Almost surely, 2^655625224 is an apocalyptic number.

It is an amenable number.

655625224 is a deficient number, since it is larger than the sum of its proper divisors (573672086).

655625224 is a wasteful number, since it uses less digits than its factorization.

655625224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81953159 (or 81953155 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 655625224 is about 25605.1796322541. The cubic root of 655625224 is about 868.7307974018.

The spelling of 655625224 in words is "six hundred fifty-five million, six hundred twenty-five thousand, two hundred twenty-four".