1055556155 has 4 divisors (see below), whose sum is σ = 1266667392. Its totient is φ = 844444920.

The previous prime is 1055556149. The next prime is 1055556241. The reversal of 1055556155 is 5516555501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1055556155 - 2¹⁰ = 1055555131 is a prime.

It is a super-2 number, since 2×1055556155² = 2228397592716768050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105555611 + ... + 105555620.

It is an arithmetic number, because the mean of its divisors is an integer number (316666848).

Almost surely, 2^1055556155 is an apocalyptic number.

1055556155 is a deficient number, since it is larger than the sum of its proper divisors (211111237).

1055556155 is an equidigital number, since it uses as much as digits as its factorization.

1055556155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211111236.

The product of its (nonzero) digits is 93750, while the sum is 38.

The square root of 1055556155 is about 32489.3237079506. The cubic root of 1055556155 is about 1018.1859834557.

The spelling of 1055556155 in words is "one billion, fifty-five million, five hundred fifty-six thousand, one hundred fifty-five".