2135504513 has 4 divisors (see below), whose sum is σ = 2135688708. Its totient is φ = 2135320320.

The previous prime is 2135504431. The next prime is 2135504573. The reversal of 2135504513 is 3154055312.

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 238640704 + 1896863809 = 15448^2 + 43553^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135504513 - 2⁸ = 2135504257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2135504573) 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, 73448 + ... + 98313.

It is an arithmetic number, because the mean of its divisors is an integer number (533922177).

Almost surely, 2^2135504513 is an apocalyptic number.

It is an amenable number.

2135504513 is a deficient number, since it is larger than the sum of its proper divisors (184195).

2135504513 is a wasteful number, since it uses less digits than its factorization.

2135504513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184194.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2135504513 is about 46211.5192673861. The cubic root of 2135504513 is about 1287.7557503441.

Adding to 2135504513 its reverse (3154055312), we get a palindrome (5289559825).

The spelling of 2135504513 in words is "two billion, one hundred thirty-five million, five hundred four thousand, five hundred thirteen".