2169424221 has 8 divisors (see below), whose sum is σ = 2900902944. Its totient is φ = 1442114160.

The previous prime is 2169424211. The next prime is 2169424223. The reversal of 2169424221 is 1224249612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2169424221 - 2⁷ = 2169424093 is a prime.

It is a super-2 number, since 2×2169424221² = 9412802901322913682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2169424223) 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, 1040950 + ... + 1043031.

It is an arithmetic number, because the mean of its divisors is an integer number (362612868).

Almost surely, 2^2169424221 is an apocalyptic number.

It is an amenable number.

2169424221 is a deficient number, since it is larger than the sum of its proper divisors (731478723).

2169424221 is a wasteful number, since it uses less digits than its factorization.

2169424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084331.

The product of its digits is 13824, while the sum is 33.

The square root of 2169424221 is about 46577.0782789131. The cubic root of 2169424221 is about 1294.5380742953.

The spelling of 2169424221 in words is "two billion, one hundred sixty-nine million, four hundred twenty-four thousand, two hundred twenty-one".