2221546456 has 16 divisors (see below), whose sum is σ = 4167726840. Its totient is φ = 1110152640.

The previous prime is 2221546447. The next prime is 2221546469. The reversal of 2221546456 is 6546451222.

It is a happy number.

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, 62181 + ... + 91156.

Almost surely, 2^2221546456 is an apocalyptic number.

It is an amenable number.

2221546456 is a deficient number, since it is larger than the sum of its proper divisors (1946180384).

2221546456 is a wasteful number, since it uses less digits than its factorization.

2221546456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155154 (or 155150 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 2221546456 is about 47133.2839509407. The cubic root of 2221546456 is about 1304.8235902133.

Adding to 2221546456 its reverse (6546451222), we get a palindrome (8767997678).

The spelling of 2221546456 in words is "two billion, two hundred twenty-one million, five hundred forty-six thousand, four hundred fifty-six".