2211805890 has 48 divisors (see below), whose sum is σ = 6572225088. Its totient is φ = 505555488.

The previous prime is 2211805847. The next prime is 2211805909. The reversal of 2211805890 is 985081122.

2211805890 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1754772 + ... + 1756031.

It is an arithmetic number, because the mean of its divisors is an integer number (136921356).

Almost surely, 2^2211805890 is an apocalyptic number.

2211805890 is an abundant number, since it is smaller than the sum of its proper divisors (4360419198).

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

2211805890 is a wasteful number, since it uses less digits than its factorization.

2211805890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510823 (or 3510820 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 2211805890 is about 47029.8404207371. The cubic root of 2211805890 is about 1302.9137582470.

The spelling of 2211805890 in words is "two billion, two hundred eleven million, eight hundred five thousand, eight hundred ninety".