1155551055 has 16 divisors (see below), whose sum is σ = 1849373664. Its totient is φ = 616129920.

The previous prime is 1155551053. The next prime is 1155551087. The reversal of 1155551055 is 5501555511.

It is not a de Polignac number, because 1155551055 - 2¹ = 1155551053 is a prime.

It is a super-2 number, since 2×1155551055² = 2670596481423226050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155551051) 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, 66585 + ... + 82125.

It is an arithmetic number, because the mean of its divisors is an integer number (115585854).

Almost surely, 2^1155551055 is an apocalyptic number.

1155551055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155551055 is a deficient number, since it is larger than the sum of its proper divisors (693822609).

1155551055 is a wasteful number, since it uses less digits than its factorization.

1155551055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20506.

The product of its (nonzero) digits is 15625, while the sum is 33.

The square root of 1155551055 is about 33993.3972265203. The cubic root of 1155551055 is about 1049.3725820829.

The spelling of 1155551055 in words is "one billion, one hundred fifty-five million, five hundred fifty-one thousand, fifty-five".