220505512255 has 24 divisors (see below), whose sum is σ = 321190646112. Its totient is φ = 144629698752.

The previous prime is 220505512229. The next prime is 220505512321. The reversal of 220505512255 is 552215505022.

It is not a de Polignac number, because 220505512255 - 2²³ = 220497123647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220505512255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19560072 + ... + 19571341.

It is an arithmetic number, because the mean of its divisors is an integer number (13382943588).

Almost surely, 2^220505512255 is an apocalyptic number.

220505512255 is a deficient number, since it is larger than the sum of its proper divisors (100685133857).

220505512255 is a wasteful number, since it uses less digits than its factorization.

220505512255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39131455 (or 39131448 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 34.

The spelling of 220505512255 in words is "two hundred twenty billion, five hundred five million, five hundred twelve thousand, two hundred fifty-five".