2149163221 has 4 divisors (see below), whose sum is σ = 2181240352. Its totient is φ = 2117086092.

The previous prime is 2149163209. The next prime is 2149163227. The reversal of 2149163221 is 1223619412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2149163221 - 2²³ = 2140774613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149163227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16038465 + ... + 16038598.

It is an arithmetic number, because the mean of its divisors is an integer number (545310088).

Almost surely, 2^2149163221 is an apocalyptic number.

It is an amenable number.

2149163221 is a deficient number, since it is larger than the sum of its proper divisors (32077131).

2149163221 is an equidigital number, since it uses as much as digits as its factorization.

2149163221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32077130.

The product of its digits is 5184, while the sum is 31.

The square root of 2149163221 is about 46359.0683793365. The cubic root of 2149163221 is about 1290.4954171490.

The spelling of 2149163221 in words is "two billion, one hundred forty-nine million, one hundred sixty-three thousand, two hundred twenty-one".