2153455521 has 8 divisors (see below), whose sum is σ = 3281456064. Its totient is φ = 1230546000.

The previous prime is 2153455511. The next prime is 2153455553. The reversal of 2153455521 is 1255543512.

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

It is not a de Polignac number, because 2153455521 - 2³⁰ = 1079713697 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 (2153455511) 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, 51272730 + ... + 51272771.

It is an arithmetic number, because the mean of its divisors is an integer number (410182008).

Almost surely, 2^2153455521 is an apocalyptic number.

2153455521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2153455521 is a deficient number, since it is larger than the sum of its proper divisors (1128000543).

2153455521 is a wasteful number, since it uses less digits than its factorization.

2153455521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102545511.

The product of its digits is 30000, while the sum is 33.

The square root of 2153455521 is about 46405.3393587419. The cubic root of 2153455521 is about 1291.3539698937.

The spelling of 2153455521 in words is "two billion, one hundred fifty-three million, four hundred fifty-five thousand, five hundred twenty-one".