2185220505550 has 48 divisors (see below), whose sum is σ = 4195854555264. Its totient is φ = 845845200000.

The previous prime is 2185220505547. The next prime is 2185220505563. The reversal of 2185220505550 is 555050225812.

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, 44772160 + ... + 44820940.

It is an arithmetic number, because the mean of its divisors is an integer number (87413636568).

Almost surely, 2^{2185220505550} is an apocalyptic number.

2185220505550 is a deficient number, since it is larger than the sum of its proper divisors (2010634049714).

2185220505550 is a wasteful number, since it uses less digits than its factorization.

2185220505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77725 (or 77720 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 40.

The spelling of 2185220505550 in words is "two trillion, one hundred eighty-five billion, two hundred twenty million, five hundred five thousand, five hundred fifty".