2153343521 has 4 divisors (see below), whose sum is σ = 2460964032. Its totient is φ = 1845723012.

The previous prime is 2153343499. The next prime is 2153343541. The reversal of 2153343521 is 1253433512.

It is a happy number.

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 not a de Polignac number, because 2153343521 - 2³⁰ = 1079601697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153343541) 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, 153810245 + ... + 153810258.

It is an arithmetic number, because the mean of its divisors is an integer number (615241008).

Almost surely, 2^2153343521 is an apocalyptic number.

It is an amenable number.

2153343521 is a deficient number, since it is larger than the sum of its proper divisors (307620511).

2153343521 is an equidigital number, since it uses as much as digits as its factorization.

2153343521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307620510.

The product of its digits is 10800, while the sum is 29.

The square root of 2153343521 is about 46404.1325853636. The cubic root of 2153343521 is about 1291.3315819765.

The spelling of 2153343521 in words is "two billion, one hundred fifty-three million, three hundred forty-three thousand, five hundred twenty-one".