1065550220 has 48 divisors (see below), whose sum is σ = 2567593728. Its totient is φ = 363864000.

The previous prime is 1065550177. The next prime is 1065550223. The reversal of 1065550220 is 220555601.

It is a super-2 number, since 2×1065550220² = 2270794542684096800, which contains 22 as substring.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1065550220.

It is not an unprimeable number, because it can be changed into a prime (1065550223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19979 + ... + 50301.

It is an arithmetic number, because the mean of its divisors is an integer number (53491536).

Almost surely, 2^1065550220 is an apocalyptic number.

1065550220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1065550220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1283796864).

1065550220 is an abundant number, since it is smaller than the sum of its proper divisors (1502043508).

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

1065550220 is a wasteful number, since it uses less digits than its factorization.

1065550220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30590 (or 30588 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1065550220 is about 32642.7667332290. The cubic root of 1065550220 is about 1021.3893089100.

The spelling of 1065550220 in words is "one billion, sixty-five million, five hundred fifty thousand, two hundred twenty".