2180221672 has 16 divisors (see below), whose sum is σ = 4117327200. Its totient is φ = 1082267760.

The previous prime is 2180221657. The next prime is 2180221753. The reversal of 2180221672 is 2761220812.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 979204 + ... + 981427.

It is an arithmetic number, because the mean of its divisors is an integer number (257332950).

Almost surely, 2^2180221672 is an apocalyptic number.

It is an amenable number.

2180221672 is a deficient number, since it is larger than the sum of its proper divisors (1937105528).

2180221672 is a wasteful number, since it uses less digits than its factorization.

2180221672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960776 (or 1960772 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 2180221672 is about 46692.8439056779. The cubic root of 2180221672 is about 1296.6822047806.

The spelling of 2180221672 in words is "two billion, one hundred eighty million, two hundred twenty-one thousand, six hundred seventy-two".