2222881921 has 8 divisors (see below), whose sum is σ = 2395048040. Its totient is φ = 2050883712.

The previous prime is 2222881919. The next prime is 2222881931. The reversal of 2222881921 is 1291882222.

It can be written as a sum of positive squares in 4 ways, for example, as 834574321 + 1388307600 = 28889^2 + 37260^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2222881921 - 2¹ = 2222881919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222881931) 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, 13770 + ... + 68083.

It is an arithmetic number, because the mean of its divisors is an integer number (299381005).

Almost surely, 2^2222881921 is an apocalyptic number.

It is an amenable number.

2222881921 is a deficient number, since it is larger than the sum of its proper divisors (172166119).

2222881921 is a wasteful number, since it uses less digits than its factorization.

2222881921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83955.

The product of its digits is 18432, while the sum is 37.

The square root of 2222881921 is about 47147.4487220677. The cubic root of 2222881921 is about 1305.0849992834.

The spelling of 2222881921 in words is "two billion, two hundred twenty-two million, eight hundred eighty-one thousand, nine hundred twenty-one".