2221355144 has 8 divisors (see below), whose sum is σ = 4165040910. Its totient is φ = 1110677568.

The previous prime is 2221355093. The next prime is 2221355207. The reversal of 2221355144 is 4415531222.

It can be written as a sum of positive squares in only one way, i.e., 1492895044 + 728460100 = 38638^2 + 26990^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138834689 + ... + 138834704.

Almost surely, 2^2221355144 is an apocalyptic number.

It is an amenable number.

2221355144 is a deficient number, since it is larger than the sum of its proper divisors (1943685766).

2221355144 is a wasteful number, since it uses less digits than its factorization.

2221355144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277669399 (or 277669395 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 2221355144 is about 47131.2544284576. The cubic root of 2221355144 is about 1304.7861334864.

Adding to 2221355144 its reverse (4415531222), we get a palindrome (6636886366).

The spelling of 2221355144 in words is "two billion, two hundred twenty-one million, three hundred fifty-five thousand, one hundred forty-four".