2221233156 has 18 divisors (see below), whose sum is σ = 5614783902. Its totient is φ = 740411040.

The previous prime is 2221233149. The next prime is 2221233229. The reversal of 2221233156 is 6513321222.

It is a happy number.

2221233156 is a `hidden beast` number, since 222 + 123 + 315 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1938993156 + 282240000 = 44034^2 + 16800^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30850425 + ... + 30850496.

It is an arithmetic number, because the mean of its divisors is an integer number (311932439).

Almost surely, 2^2221233156 is an apocalyptic number.

It is an amenable number.

2221233156 is an abundant number, since it is smaller than the sum of its proper divisors (3393550746).

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

2221233156 is a wasteful number, since it uses less digits than its factorization.

2221233156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61700931 (or 61700926 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2221233156 is about 47129.9602800596. The cubic root of 2221233156 is about 1304.7622484921.

Adding to 2221233156 its reverse (6513321222), we get a palindrome (8734554378).

The spelling of 2221233156 in words is "two billion, two hundred twenty-one million, two hundred thirty-three thousand, one hundred fifty-six".