1055565220 has 24 divisors (see below), whose sum is σ = 2313065664. Its totient is φ = 403868256.

The previous prime is 1055565163. The next prime is 1055565223. The reversal of 1055565220 is 225655501.

It is a super-2 number, since 2×1055565220² = 2228435867347296800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055565223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1146894 + ... + 1147813.

It is an arithmetic number, because the mean of its divisors is an integer number (96377736).

Almost surely, 2^1055565220 is an apocalyptic number.

1055565220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1055565220 is an abundant number, since it is smaller than the sum of its proper divisors (1257500444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1055565220 is a wasteful number, since it uses less digits than its factorization.

1055565220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294739 (or 2294737 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1055565220 is about 32489.4632150179. The cubic root of 1055565220 is about 1018.1888981370.

The spelling of 1055565220 in words is "one billion, fifty-five million, five hundred sixty-five thousand, two hundred twenty".