2153206321 has 16 divisors (see below), whose sum is σ = 2498491008. Its totient is φ = 1817424000.

The previous prime is 2153206309. The next prime is 2153206343. The reversal of 2153206321 is 1236023512.

It is not a de Polignac number, because 2153206321 - 2⁷ = 2153206193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153206351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355206 + ... + 361216.

It is an arithmetic number, because the mean of its divisors is an integer number (156155688).

Almost surely, 2^2153206321 is an apocalyptic number.

It is an amenable number.

2153206321 is a deficient number, since it is larger than the sum of its proper divisors (345284687).

2153206321 is an equidigital number, since it uses as much as digits as its factorization.

2153206321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6792.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2153206321 is about 46402.6542452046. The cubic root of 2153206321 is about 1291.3041557198.

Adding to 2153206321 its reverse (1236023512), we get a palindrome (3389229833).

The spelling of 2153206321 in words is "two billion, one hundred fifty-three million, two hundred six thousand, three hundred twenty-one".