550721955 has 32 divisors (see below), whose sum is σ = 1016294400. Its totient is φ = 249443712.

The previous prime is 550721939. The next prime is 550721981. The reversal of 550721955 is 559127055.

It is not a de Polignac number, because 550721955 - 2⁴ = 550721939 is a prime.

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, 12615 + ... + 35504.

It is an arithmetic number, because the mean of its divisors is an integer number (31759200).

Almost surely, 2^550721955 is an apocalyptic number.

550721955 is a deficient number, since it is larger than the sum of its proper divisors (465572445).

550721955 is a wasteful number, since it uses less digits than its factorization.

550721955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48243.

The product of its (nonzero) digits is 78750, while the sum is 39.

The square root of 550721955 is about 23467.4658836441. The cubic root of 550721955 is about 819.6796066375.

The spelling of 550721955 in words is "five hundred fifty million, seven hundred twenty-one thousand, nine hundred fifty-five".