2133145517 has 4 divisors (see below), whose sum is σ = 2135578716. Its totient is φ = 2130712320.

The previous prime is 2133145493. The next prime is 2133145541. The reversal of 2133145517 is 7155413312.

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 (2133145493) and next prime (2133145541).

It can be written as a sum of positive squares in 2 ways, for example, as 1257340681 + 875804836 = 35459^2 + 29594^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133145517 - 2⁶ = 2133145453 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 (2133145117) 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, 1215284 + ... + 1217037.

It is an arithmetic number, because the mean of its divisors is an integer number (533894679).

Almost surely, 2^2133145517 is an apocalyptic number.

It is an amenable number.

2133145517 is a deficient number, since it is larger than the sum of its proper divisors (2433199).

2133145517 is an equidigital number, since it uses as much as digits as its factorization.

2133145517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433198.

The product of its digits is 12600, while the sum is 32.

The square root of 2133145517 is about 46185.9883189696. The cubic root of 2133145517 is about 1287.2814003080.

Adding to 2133145517 its reverse (7155413312), we get a palindrome (9288558829).

The spelling of 2133145517 in words is "two billion, one hundred thirty-three million, one hundred forty-five thousand, five hundred seventeen".