2120555550 has 48 divisors (see below), whose sum is σ = 5262042672. Its totient is φ = 565152000.

The previous prime is 2120555543. The next prime is 2120555579. The reversal of 2120555550 is 555550212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362650 + ... + 368450.

It is an arithmetic number, because the mean of its divisors is an integer number (109625889).

Almost surely, 2^2120555550 is an apocalyptic number.

2120555550 is an abundant number, since it is smaller than the sum of its proper divisors (3141487122).

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

2120555550 is a wasteful number, since it uses less digits than its factorization.

2120555550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8253 (or 8248 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 2120555550 is about 46049.4902251914. The cubic root of 2120555550 is about 1284.7438612952.

The spelling of 2120555550 in words is "two billion, one hundred twenty million, five hundred fifty-five thousand, five hundred fifty".