2211556540 has 24 divisors (see below), whose sum is σ = 4654319040. Its totient is φ = 882708288.

The previous prime is 2211556507. The next prime is 2211556549. The reversal of 2211556540 is 456551122.

2211556540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211556549) 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, 110155 + ... + 128674.

It is an arithmetic number, because the mean of its divisors is an integer number (193929960).

Almost surely, 2^2211556540 is an apocalyptic number.

2211556540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211556540 is an abundant number, since it is smaller than the sum of its proper divisors (2442762500).

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

2211556540 is a wasteful number, since it uses less digits than its factorization.

2211556540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239301 (or 239299 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 2211556540 is about 47027.1893695551. The cubic root of 2211556540 is about 1302.8647946744.

The spelling of 2211556540 in words is "two billion, two hundred eleven million, five hundred fifty-six thousand, five hundred forty".