2133144454565 has 4 divisors (see below), whose sum is σ = 2559773345484. Its totient is φ = 1706515563648.

The previous prime is 2133144454531. The next prime is 2133144454577. The reversal of 2133144454565 is 5654544413312.

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 637645369729 + 1495499084836 = 798527^2 + 1222906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133144454565 - 2²⁰ = 2133143405989 is a prime.

It is a super-2 number, since 2×2133144454565² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213314445452 + ... + 213314445461.

It is an arithmetic number, because the mean of its divisors is an integer number (639943336371).

Almost surely, 2^{2133144454565} is an apocalyptic number.

It is an amenable number.

2133144454565 is a deficient number, since it is larger than the sum of its proper divisors (426628890919).

2133144454565 is an equidigital number, since it uses as much as digits as its factorization.

2133144454565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426628890918.

The product of its digits is 3456000, while the sum is 47.

Adding to 2133144454565 its reverse (5654544413312), we get a palindrome (7787688867877).

The spelling of 2133144454565 in words is "two trillion, one hundred thirty-three billion, one hundred forty-four million, four hundred fifty-four thousand, five hundred sixty-five".