655222557 has 16 divisors (see below), whose sum is σ = 955195200. Its totient is φ = 396211200.

The previous prime is 655222537. The next prime is 655222573. The reversal of 655222557 is 755222556.

It is not a de Polignac number, because 655222557 - 2⁶ = 655222493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655222507) 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 15 ways as a sum of consecutive naturals, for example, 7294 + ... + 36927.

It is an arithmetic number, because the mean of its divisors is an integer number (59699700).

Almost surely, 2^655222557 is an apocalyptic number.

It is an amenable number.

655222557 is a deficient number, since it is larger than the sum of its proper divisors (299972643).

655222557 is a wasteful number, since it uses less digits than its factorization.

655222557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44684.

The product of its digits is 210000, while the sum is 39.

The square root of 655222557 is about 25597.3154256457. The cubic root of 655222557 is about 868.5529107830.

Subtracting 655222557 from its reverse (755222556), we obtain a palindrome (99999999).

The spelling of 655222557 in words is "six hundred fifty-five million, two hundred twenty-two thousand, five hundred fifty-seven".