2201921872 has 20 divisors (see below), whose sum is σ = 4517178516. Its totient is φ = 1036198400.

The previous prime is 2201921861. The next prime is 2201921879. The reversal of 2201921872 is 2781291022.

It can be written as a sum of positive squares in 2 ways, for example, as 1628606736 + 573315136 = 40356^2 + 23944^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201921879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4047379 + ... + 4047922.

Almost surely, 2^2201921872 is an apocalyptic number.

It is an amenable number.

2201921872 is an abundant number, since it is smaller than the sum of its proper divisors (2315256644).

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

2201921872 is a wasteful number, since it uses less digits than its factorization.

2201921872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095326 (or 8095320 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 2201921872 is about 46924.6403502467. The cubic root of 2201921872 is about 1300.9700593940.

The spelling of 2201921872 in words is "two billion, two hundred one million, nine hundred twenty-one thousand, eight hundred seventy-two".