550561155 has 16 divisors (see below), whose sum is σ = 895829760. Its totient is φ = 288655328.

The previous prime is 550561127. The next prime is 550561181. The reversal of 550561155 is 551165055.

It is a cyclic number.

It is not a de Polignac number, because 550561155 - 2¹⁵ = 550528387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310167 + ... + 311936.

It is an arithmetic number, because the mean of its divisors is an integer number (55989360).

Almost surely, 2^550561155 is an apocalyptic number.

550561155 is a deficient number, since it is larger than the sum of its proper divisors (345268605).

550561155 is a wasteful number, since it uses less digits than its factorization.

550561155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622170.

The product of its (nonzero) digits is 18750, while the sum is 33.

The square root of 550561155 is about 23464.0396138431. The cubic root of 550561155 is about 819.5998220870.

The spelling of 550561155 in words is "five hundred fifty million, five hundred sixty-one thousand, one hundred fifty-five".