515245133 has 4 divisors (see below), whose sum is σ = 554879388. Its totient is φ = 475610880.

The previous prime is 515245127. The next prime is 515245147. The reversal of 515245133 is 331542515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331542515 = 5 ⋅66308503.

It can be written as a sum of positive squares in 2 ways, for example, as 276789769 + 238455364 = 16637^2 + 15442^2 .

It is a cyclic number.

It is not a de Polignac number, because 515245133 - 2²⁴ = 498467917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 515245096 and 515245105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515245123) 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, 19817108 + ... + 19817133.

It is an arithmetic number, because the mean of its divisors is an integer number (138719847).

Almost surely, 2^515245133 is an apocalyptic number.

It is an amenable number.

515245133 is a deficient number, since it is larger than the sum of its proper divisors (39634255).

515245133 is a wasteful number, since it uses less digits than its factorization.

515245133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39634254.

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

The square root of 515245133 is about 22699.0117185749. The cubic root of 515245133 is about 801.6866151005.

Adding to 515245133 its reverse (331542515), we get a palindrome (846787648).

The spelling of 515245133 in words is "five hundred fifteen million, two hundred forty-five thousand, one hundred thirty-three".