2155423553 has 4 divisors (see below), whose sum is σ = 2172395520. Its totient is φ = 2138451588.

The previous prime is 2155423549. The next prime is 2155423573. The reversal of 2155423553 is 3553245512.

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 a cyclic number.

It is not a de Polignac number, because 2155423553 - 2² = 2155423549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155423513) 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, 8485793 + ... + 8486046.

It is an arithmetic number, because the mean of its divisors is an integer number (543098880).

Almost surely, 2^2155423553 is an apocalyptic number.

It is an amenable number.

2155423553 is a deficient number, since it is larger than the sum of its proper divisors (16971967).

2155423553 is a wasteful number, since it uses less digits than its factorization.

2155423553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16971966.

The product of its digits is 90000, while the sum is 35.

The square root of 2155423553 is about 46426.5393175067. The cubic root of 2155423553 is about 1291.7472373818.

The spelling of 2155423553 in words is "two billion, one hundred fifty-five million, four hundred twenty-three thousand, five hundred fifty-three".