220651655 has 48 divisors (see below), whose sum is σ = 327991680. Its totient is φ = 141680448.

The previous prime is 220651649. The next prime is 220651727. The reversal of 220651655 is 556156022.

It is not a de Polignac number, because 220651655 - 2¹⁸ = 220389511 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 (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 497864 + ... + 498306.

It is an arithmetic number, because the mean of its divisors is an integer number (6833160).

Almost surely, 2^220651655 is an apocalyptic number.

220651655 is a deficient number, since it is larger than the sum of its proper divisors (107340025).

220651655 is a wasteful number, since it uses less digits than its factorization.

220651655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 220651655 is about 14854.3480166583. The cubic root of 220651655 is about 604.2765343013.

The spelling of 220651655 in words is "two hundred twenty million, six hundred fifty-one thousand, six hundred fifty-five".