2153020145 has 4 divisors (see below), whose sum is σ = 2583624180. Its totient is φ = 1722416112.

The previous prime is 2153020141. The next prime is 2153020147. The reversal of 2153020145 is 5410203512.

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 1428764401 + 724255744 = 37799^2 + 26912^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153020145 - 2² = 2153020141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2153020145.

It is not an unprimeable number, because it can be changed into a prime (2153020141) 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, 215302010 + ... + 215302019.

It is an arithmetic number, because the mean of its divisors is an integer number (645906045).

Almost surely, 2^2153020145 is an apocalyptic number.

It is an amenable number.

2153020145 is a deficient number, since it is larger than the sum of its proper divisors (430604035).

2153020145 is an equidigital number, since it uses as much as digits as its factorization.

2153020145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430604034.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2153020145 is about 46400.6481096978. The cubic root of 2153020145 is about 1291.2669373060.

Adding to 2153020145 its reverse (5410203512), we get a palindrome (7563223657).

The spelling of 2153020145 in words is "two billion, one hundred fifty-three million, twenty thousand, one hundred forty-five".