2153518223 has 4 divisors (see below), whose sum is σ = 2153752440. Its totient is φ = 2153284008.

The previous prime is 2153518219. The next prime is 2153518247. The reversal of 2153518223 is 3228153512.

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

It is a cyclic number.

It is not a de Polignac number, because 2153518223 - 2² = 2153518219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2153518223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153718223) 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, 102728 + ... + 121901.

It is an arithmetic number, because the mean of its divisors is an integer number (538438110).

Almost surely, 2^2153518223 is an apocalyptic number.

2153518223 is a deficient number, since it is larger than the sum of its proper divisors (234217).

2153518223 is an equidigital number, since it uses as much as digits as its factorization.

2153518223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234216.

The product of its digits is 14400, while the sum is 32.

The square root of 2153518223 is about 46406.0149441858. The cubic root of 2153518223 is about 1291.3665031904.

The spelling of 2153518223 in words is "two billion, one hundred fifty-three million, five hundred eighteen thousand, two hundred twenty-three".