2153450221 has 12 divisors (see below), whose sum is σ = 2353655232. Its totient is φ = 1969206096.

The previous prime is 2153450207. The next prime is 2153450237. The reversal of 2153450221 is 1220543512.

It is not a de Polignac number, because 2153450221 - 2²⁹ = 1616579309 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 (2153490221) 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, 41461 + ... + 77626.

It is an arithmetic number, because the mean of its divisors is an integer number (196137936).

Almost surely, 2^2153450221 is an apocalyptic number.

It is an amenable number.

2153450221 is a deficient number, since it is larger than the sum of its proper divisors (200205011).

2153450221 is a wasteful number, since it uses less digits than its factorization.

2153450221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119220 (or 119207 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2153450221 is about 46405.2822532091. The cubic root of 2153450221 is about 1291.3529104830.

Adding to 2153450221 its reverse (1220543512), we get a palindrome (3373993733).

The spelling of 2153450221 in words is "two billion, one hundred fifty-three million, four hundred fifty thousand, two hundred twenty-one".