655222556 has 6 divisors (see below), whose sum is σ = 1146639480. Its totient is φ = 327611276.

The previous prime is 655222537. The next prime is 655222573.

655222556 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81902816 + ... + 81902823.

It is an arithmetic number, because the mean of its divisors is an integer number (191106580).

Almost surely, 2^655222556 is an apocalyptic number.

It is an amenable number.

655222556 is a deficient number, since it is larger than the sum of its proper divisors (491416924).

655222556 is a wasteful number, since it uses less digits than its factorization.

655222556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163805643 (or 163805641 counting only the distinct ones).

The product of its digits is 180000, while the sum is 38.

The square root of 655222556 is about 25597.3154061124. The cubic root of 655222556 is about 868.5529103411.

The spelling of 655222556 in words is "six hundred fifty-five million, two hundred twenty-two thousand, five hundred fifty-six".