2221555120 has 40 divisors (see below), whose sum is σ = 5205809664. Its totient is φ = 881620992.

The previous prime is 2221555109. The next prime is 2221555123. The reversal of 2221555120 is 215551222.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2221555123) 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, 99169 + ... + 119488.

Almost surely, 2^2221555120 is an apocalyptic number.

2221555120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221555120 is an abundant number, since it is smaller than the sum of its proper divisors (2984254544).

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

2221555120 is a wasteful number, since it uses less digits than its factorization.

2221555120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218797 (or 218791 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2221555120 is about 47133.3758604240. The cubic root of 2221555120 is about 1304.8252864757.

It can be divided in two parts, 2 and 221555120, that added together give a palindrome (221555122).

The spelling of 2221555120 in words is "two billion, two hundred twenty-one million, five hundred fifty-five thousand, one hundred twenty".