513130251 has 4 divisors (see below), whose sum is σ = 684173672. Its totient is φ = 342086832.

The previous prime is 513130237. The next prime is 513130273. The reversal of 513130251 is 152031315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 513130251 - 2⁹ = 513129739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513030251) 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, 85521706 + ... + 85521711.

It is an arithmetic number, because the mean of its divisors is an integer number (171043418).

Almost surely, 2^513130251 is an apocalyptic number.

513130251 is a deficient number, since it is larger than the sum of its proper divisors (171043421).

513130251 is a wasteful number, since it uses less digits than its factorization.

513130251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171043420.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 513130251 is about 22652.3784843888. The cubic root of 513130251 is about 800.5882397573.

Adding to 513130251 its reverse (152031315), we get a palindrome (665161566).

The spelling of 513130251 in words is "five hundred thirteen million, one hundred thirty thousand, two hundred fifty-one".