2163665353 has 4 divisors (see below), whose sum is σ = 2182812948. Its totient is φ = 2144517760.

The previous prime is 2163665347. The next prime is 2163665359. The reversal of 2163665353 is 3535663612.

It is a happy number.

2163665353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2163665347) and next prime (2163665359).

It can be written as a sum of positive squares in 2 ways, for example, as 31719424 + 2131945929 = 5632^2 + 46173^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163665353 - 2²⁹ = 1626794441 is a prime.

It is a super-2 number, since 2×2163665353² = 9362895519545229218, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163665359) 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, 9573628 + ... + 9573853.

It is an arithmetic number, because the mean of its divisors is an integer number (545703237).

Almost surely, 2^2163665353 is an apocalyptic number.

It is an amenable number.

2163665353 is a deficient number, since it is larger than the sum of its proper divisors (19147595).

2163665353 is a wasteful number, since it uses less digits than its factorization.

2163665353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19147594.

The product of its digits is 291600, while the sum is 40.

The square root of 2163665353 is about 46515.2163598107. The cubic root of 2163665353 is about 1293.3915826421.

The spelling of 2163665353 in words is "two billion, one hundred sixty-three million, six hundred sixty-five thousand, three hundred fifty-three".