220515055506 has 64 divisors (see below), whose sum is σ = 494292326400. Its totient is φ = 72868194000.

The previous prime is 220515055459. The next prime is 220515055511. The reversal of 220515055506 is 605550515022.

220515055506 is a `hidden beast` number, since 2 + 2 + 0 + 51 + 50 + 5 + 550 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3976075 + ... + 4031153.

It is an arithmetic number, because the mean of its divisors is an integer number (7723317600).

Almost surely, 2^220515055506 is an apocalyptic number.

220515055506 is an abundant number, since it is smaller than the sum of its proper divisors (273777270894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220515055506 is a wasteful number, since it uses less digits than its factorization.

220515055506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55732 (or 55726 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 220515055506 in words is "two hundred twenty billion, five hundred fifteen million, fifty-five thousand, five hundred six".