2153443553 has 4 divisors (see below), whose sum is σ = 2175644100. Its totient is φ = 2131243008.

The previous prime is 2153443543. The next prime is 2153443559. The reversal of 2153443553 is 3553443512.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 293505424 + 1859938129 = 17132^2 + 43127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2153443553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153443559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11100128 + ... + 11100321.

It is an arithmetic number, because the mean of its divisors is an integer number (543911025).

Almost surely, 2^2153443553 is an apocalyptic number.

It is an amenable number.

2153443553 is a deficient number, since it is larger than the sum of its proper divisors (22200547).

2153443553 is an equidigital number, since it uses as much as digits as its factorization.

2153443553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22200546.

The product of its digits is 108000, while the sum is 35.

The square root of 2153443553 is about 46405.2104078842. The cubic root of 2153443553 is about 1291.3515776219.

The spelling of 2153443553 in words is "two billion, one hundred fifty-three million, four hundred forty-three thousand, five hundred fifty-three".