655221122205 has 32 divisors (see below), whose sum is σ = 1129600442880. Its totient is φ = 322397813760.

The previous prime is 655221122137. The next prime is 655221122233. The reversal of 655221122205 is 502221122556.

It is a happy number.

It is not a de Polignac number, because 655221122205 - 2¹² = 655221118109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 533100 + ... + 1262789.

It is an arithmetic number, because the mean of its divisors is an integer number (35300013840).

Almost surely, 2^655221122205 is an apocalyptic number.

655221122205 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

655221122205 is a deficient number, since it is larger than the sum of its proper divisors (474379320675).

655221122205 is a wasteful number, since it uses less digits than its factorization.

655221122205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797781.

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 655221122205 in words is "six hundred fifty-five billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred five".