513006506 has 4 divisors (see below), whose sum is σ = 769509762. Its totient is φ = 256503252.

The previous prime is 513006503. The next prime is 513006511. The reversal of 513006506 is 605600315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605600315 = 5 ⋅121120063.

It can be written as a sum of positive squares in only one way, i.e., 426050881 + 86955625 = 20641^2 + 9325^2 .

It is not an unprimeable number, because it can be changed into a prime (513006503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128251625 + ... + 128251628.

Almost surely, 2^513006506 is an apocalyptic number.

513006506 is a deficient number, since it is larger than the sum of its proper divisors (256503256).

513006506 is a wasteful number, since it uses less digits than its factorization.

513006506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256503255.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 513006506 is about 22649.6469288155. The cubic root of 513006506 is about 800.5238787389.

The spelling of 513006506 in words is "five hundred thirteen million, six thousand, five hundred six".