2011226556 has 48 divisors (see below), whose sum is σ = 4905635840. Its totient is φ = 640560960.

The previous prime is 2011226549. The next prime is 2011226561. The reversal of 2011226556 is 6556221102.

It is a super-2 number, since 2×2011226556² = 8090064519119242272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4831 + ... + 63606.

Almost surely, 2^2011226556 is an apocalyptic number.

It is an amenable number.

2011226556 is an abundant number, since it is smaller than the sum of its proper divisors (2894409284).

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

2011226556 is a wasteful number, since it uses less digits than its factorization.

2011226556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68554 (or 68552 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2011226556 is about 44846.7006144265. The cubic root of 2011226556 is about 1262.2740816680.

Adding to 2011226556 its reverse (6556221102), we get a palindrome (8567447658).

The spelling of 2011226556 in words is "two billion, eleven million, two hundred twenty-six thousand, five hundred fifty-six".