2221199888 has 10 divisors (see below), whose sum is σ = 4303574814. Its totient is φ = 1110599936.

The previous prime is 2221199863. The next prime is 2221199933. The reversal of 2221199888 is 8889911222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1693487104 + 527712784 = 41152^2 + 22972^2 .

It is a zygodrome in base 10.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69412481 + ... + 69412512.

Almost surely, 2^2221199888 is an apocalyptic number.

It is an amenable number.

2221199888 is a deficient number, since it is larger than the sum of its proper divisors (2082374926).

2221199888 is a wasteful number, since it uses less digits than its factorization.

2221199888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138825001 (or 138824995 counting only the distinct ones).

The product of its digits is 331776, while the sum is 50.

The square root of 2221199888 is about 47129.6073397604. The cubic root of 2221199888 is about 1304.7557345358.

The spelling of 2221199888 in words is "two billion, two hundred twenty-one million, one hundred ninety-nine thousand, eight hundred eighty-eight".