2221149556 has 24 divisors (see below), whose sum is σ = 4048065000. Its totient is φ = 1065074304.

The previous prime is 2221149551. The next prime is 2221149559. The reversal of 2221149556 is 6559411222.

It can be written as a sum of positive squares in 4 ways, for example, as 227527056 + 1993622500 = 15084^2 + 44650^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221149551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46971 + ... + 81538.

It is an arithmetic number, because the mean of its divisors is an integer number (168669375).

Almost surely, 2^2221149556 is an apocalyptic number.

It is an amenable number.

2221149556 is a deficient number, since it is larger than the sum of its proper divisors (1826915444).

2221149556 is a wasteful number, since it uses less digits than its factorization.

2221149556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128691 (or 128689 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 2221149556 is about 47129.0733624161. The cubic root of 2221149556 is about 1304.7458792827.

The spelling of 2221149556 in words is "two billion, two hundred twenty-one million, one hundred forty-nine thousand, five hundred fifty-six".