2211761804 has 54 divisors (see below), whose sum is σ = 4752113940. Its totient is φ = 897979824.

The previous prime is 2211761771. The next prime is 2211761813. The reversal of 2211761804 is 4081671122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55127 + ... + 86385.

It is an arithmetic number, because the mean of its divisors is an integer number (88002110).

Almost surely, 2^2211761804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211761804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2376056970).

2211761804 is an abundant number, since it is smaller than the sum of its proper divisors (2540352136).

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

2211761804 is a wasteful number, since it uses less digits than its factorization.

2211761804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31315 (or 31287 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 2211761804 is about 47029.3717159819. The cubic root of 2211761804 is about 1302.9051015745.

The spelling of 2211761804 in words is "two billion, two hundred eleven million, seven hundred sixty-one thousand, eight hundred four".