2169238221 has 12 divisors (see below), whose sum is σ = 3177476640. Its totient is φ = 1425789960.

The previous prime is 2169238213. The next prime is 2169238223. The reversal of 2169238221 is 1228329612.

It is a happy number.

2169238221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2169238221 - 2³ = 2169238213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169238223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1696731 + ... + 1698008.

It is an arithmetic number, because the mean of its divisors is an integer number (264789720).

Almost surely, 2^2169238221 is an apocalyptic number.

It is an amenable number.

2169238221 is a deficient number, since it is larger than the sum of its proper divisors (1008238419).

2169238221 is a wasteful number, since it uses less digits than its factorization.

2169238221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394816 (or 3394813 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2169238221 is about 46575.0815458223. The cubic root of 2169238221 is about 1294.5010766193.

The spelling of 2169238221 in words is "two billion, one hundred sixty-nine million, two hundred thirty-eight thousand, two hundred twenty-one".