2165442253 has 8 divisors (see below), whose sum is σ = 2376015768. Its totient is φ = 1961154624.

The previous prime is 2165442241. The next prime is 2165442271. The reversal of 2165442253 is 3522445612.

It can be written as a sum of positive squares in 4 ways, for example, as 114982729 + 2050459524 = 10723^2 + 45282^2 .

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

It is not a de Polignac number, because 2165442253 - 2⁵ = 2165442221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165442283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1570750 + ... + 1572127.

It is an arithmetic number, because the mean of its divisors is an integer number (297001971).

Almost surely, 2^2165442253 is an apocalyptic number.

It is an amenable number.

2165442253 is a deficient number, since it is larger than the sum of its proper divisors (210573515).

2165442253 is a wasteful number, since it uses less digits than its factorization.

2165442253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142943.

The product of its digits is 57600, while the sum is 34.

The square root of 2165442253 is about 46534.3126413188. The cubic root of 2165442253 is about 1293.7455496809.

Adding to 2165442253 its reverse (3522445612), we get a palindrome (5687887865).

The spelling of 2165442253 in words is "two billion, one hundred sixty-five million, four hundred forty-two thousand, two hundred fifty-three".