2221289280 has 168 divisors, whose sum is σ = 8731861632. Its totient is φ = 507718656.

The previous prime is 2221289269. The next prime is 2221289299. The reversal of 2221289280 is 829821222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 34932 + ... + 75251.

Almost surely, 2^2221289280 is an apocalyptic number.

2221289280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221289280 is an abundant number, since it is smaller than the sum of its proper divisors (6510572352).

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

2221289280 is a wasteful number, since it uses less digits than its factorization.

2221289280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110213 (or 110200 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 2221289280 is about 47130.5556937323. Note that the first 3 decimals coincide. The cubic root of 2221289280 is about 1304.7732375621.

The spelling of 2221289280 in words is "two billion, two hundred twenty-one million, two hundred eighty-nine thousand, two hundred eighty".