513205450 has 12 divisors (see below), whose sum is σ = 954562230. Its totient is φ = 205282160.

The previous prime is 513205411. The next prime is 513205457. The reversal of 513205450 is 54502315.

It can be written as a sum of positive squares in 3 ways, for example, as 499567201 + 13638249 = 22351^2 + 3693^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (513205457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5132005 + ... + 5132104.

Almost surely, 2^513205450 is an apocalyptic number.

513205450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

513205450 is a deficient number, since it is larger than the sum of its proper divisors (441356780).

513205450 is a wasteful number, since it uses less digits than its factorization.

513205450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264121 (or 10264116 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 513205450 is about 22654.0382713546. The cubic root of 513205450 is about 800.6273464586.

Adding to 513205450 its reverse (54502315), we get a palindrome (567707765).

The spelling of 513205450 in words is "five hundred thirteen million, two hundred five thousand, four hundred fifty".