2123543553 has 8 divisors (see below), whose sum is σ = 2907915648. Its totient is φ = 1377433584.

The previous prime is 2123543509. The next prime is 2123543557. The reversal of 2123543553 is 3553453212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123543553 - 2¹⁰ = 2123542529 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2123543557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9565401 + ... + 9565622.

It is an arithmetic number, because the mean of its divisors is an integer number (363489456).

Almost surely, 2^2123543553 is an apocalyptic number.

It is an amenable number.

2123543553 is a deficient number, since it is larger than the sum of its proper divisors (784372095).

2123543553 is a wasteful number, since it uses less digits than its factorization.

2123543553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19131063.

The product of its digits is 54000, while the sum is 33.

The square root of 2123543553 is about 46081.9221929815. The cubic root of 2123543553 is about 1285.3470077792.

Adding to 2123543553 its reverse (3553453212), we get a palindrome (5676996765).

The spelling of 2123543553 in words is "two billion, one hundred twenty-three million, five hundred forty-three thousand, five hundred fifty-three".