550521155 has 16 divisors (see below), whose sum is σ = 671860224. Its totient is φ = 432979680.

The previous prime is 550521151. The next prime is 550521161. The reversal of 550521155 is 551125055.

It is not a de Polignac number, because 550521155 - 2² = 550521151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550521151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84422 + ... + 90708.

It is an arithmetic number, because the mean of its divisors is an integer number (41991264).

Almost surely, 2^550521155 is an apocalyptic number.

550521155 is a deficient number, since it is larger than the sum of its proper divisors (121339069).

550521155 is a wasteful number, since it uses less digits than its factorization.

550521155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586.

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 550521155 is about 23463.1872302124. The cubic root of 550521155 is about 819.5799727711.

The spelling of 550521155 in words is "five hundred fifty million, five hundred twenty-one thousand, one hundred fifty-five".