2220155772 has 12 divisors (see below), whose sum is σ = 5180363496. Its totient is φ = 740051920.

The previous prime is 2220155767. The next prime is 2220155797. The reversal of 2220155772 is 2775510222.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92506479 + ... + 92506502.

It is an arithmetic number, because the mean of its divisors is an integer number (431696958).

Almost surely, 2^2220155772 is an apocalyptic number.

It is an amenable number.

2220155772 is an abundant number, since it is smaller than the sum of its proper divisors (2960207724).

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

2220155772 is a wasteful number, since it uses less digits than its factorization.

2220155772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185012988 (or 185012986 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 2220155772 is about 47118.5289668512. The cubic root of 2220155772 is about 1304.5512609895.

Adding to 2220155772 its reverse (2775510222), we get a palindrome (4995665994).

The spelling of 2220155772 in words is "two billion, two hundred twenty million, one hundred fifty-five thousand, seven hundred seventy-two".