2153210243 has 4 divisors (see below), whose sum is σ = 2205727608. Its totient is φ = 2100692880.

The previous prime is 2153210239. The next prime is 2153210261. The reversal of 2153210243 is 3420123512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2153210243 - 2² = 2153210239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153210203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26258621 + ... + 26258702.

It is an arithmetic number, because the mean of its divisors is an integer number (551431902).

Almost surely, 2^2153210243 is an apocalyptic number.

2153210243 is a deficient number, since it is larger than the sum of its proper divisors (52517365).

2153210243 is an equidigital number, since it uses as much as digits as its factorization.

2153210243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52517364.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2153210243 is about 46402.6965056989. The cubic root of 2153210243 is about 1291.3049397432.

Adding to 2153210243 its reverse (3420123512), we get a palindrome (5573333755).

The spelling of 2153210243 in words is "two billion, one hundred fifty-three million, two hundred ten thousand, two hundred forty-three".