1220055265 has 32 divisors (see below), whose sum is σ = 1810569600. Its totient is φ = 775941120.

The previous prime is 1220055241. The next prime is 1220055293. The reversal of 1220055265 is 5625500221.

It is not a de Polignac number, because 1220055265 - 2¹¹ = 1220053217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31320 + ... + 58489.

It is an arithmetic number, because the mean of its divisors is an integer number (56580300).

Almost surely, 2^1220055265 is an apocalyptic number.

It is an amenable number.

1220055265 is a deficient number, since it is larger than the sum of its proper divisors (590514335).

1220055265 is a wasteful number, since it uses less digits than its factorization.

1220055265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89857.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1220055265 is about 34929.2895003606. The cubic root of 1220055265 is about 1068.5458644122.

Adding to 1220055265 its reverse (5625500221), we get a palindrome (6845555486).

The spelling of 1220055265 in words is "one billion, two hundred twenty million, fifty-five thousand, two hundred sixty-five".