2169209108 has 18 divisors (see below), whose sum is σ = 4172591178. Its totient is φ = 986003920.

The previous prime is 2169209087. The next prime is 2169209117. The reversal of 2169209108 is 8019029612.

It can be written as a sum of positive squares in only one way, i.e., 1138927504 + 1030281604 = 33748^2 + 32098^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2240435 + ... + 2241402.

It is an arithmetic number, because the mean of its divisors is an integer number (231810621).

Almost surely, 2^2169209108 is an apocalyptic number.

It is an amenable number.

2169209108 is a deficient number, since it is larger than the sum of its proper divisors (2003382070).

2169209108 is a wasteful number, since it uses less digits than its factorization.

2169209108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481863 (or 4481850 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 2169209108 is about 46574.7690064052. The cubic root of 2169209108 is about 1294.4952854959.

The spelling of 2169209108 in words is "two billion, one hundred sixty-nine million, two hundred nine thousand, one hundred eight".