2153623145 has 4 divisors (see below), whose sum is σ = 2584347780. Its totient is φ = 1722898512.

The previous prime is 2153623141. The next prime is 2153623159. The reversal of 2153623145 is 5413263512.

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 1025536576 + 1128086569 = 32024^2 + 33587^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153623145 - 2² = 2153623141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2153623141) 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, 215362310 + ... + 215362319.

It is an arithmetic number, because the mean of its divisors is an integer number (646086945).

Almost surely, 2^2153623145 is an apocalyptic number.

It is an amenable number.

2153623145 is a deficient number, since it is larger than the sum of its proper divisors (430724635).

2153623145 is an equidigital number, since it uses as much as digits as its factorization.

2153623145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430724634.

The product of its digits is 21600, while the sum is 32.

The square root of 2153623145 is about 46407.1454088700. The cubic root of 2153623145 is about 1291.3874751600.

Adding to 2153623145 its reverse (5413263512), we get a palindrome (7566886657).

The spelling of 2153623145 in words is "two billion, one hundred fifty-three million, six hundred twenty-three thousand, one hundred forty-five".