220780550 has 24 divisors (see below), whose sum is σ = 412734000. Its totient is φ = 87864480.

The previous prime is 220780499. The next prime is 220780561. The reversal of 220780550 is 55087022.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1145 + ... + 21044.

It is an arithmetic number, because the mean of its divisors is an integer number (17197250).

Almost surely, 2^220780550 is an apocalyptic number.

220780550 is a deficient number, since it is larger than the sum of its proper divisors (191953450).

220780550 is a wasteful number, since it uses less digits than its factorization.

220780550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22400 (or 22395 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 220780550 is about 14858.6860118922. The cubic root of 220780550 is about 604.3941753292.

The spelling of 220780550 in words is "two hundred twenty million, seven hundred eighty thousand, five hundred fifty".