513225251 has 12 divisors (see below), whose sum is σ = 644713776. Its totient is φ = 399915120.

The previous prime is 513225227. The next prime is 513225263. The reversal of 513225251 is 152522315.

It is not a de Polignac number, because 513225251 - 2¹⁰ = 513224227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 513225251.

It is not an unprimeable number, because it can be changed into a prime (513225211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 302120 + ... + 303813.

It is an arithmetic number, because the mean of its divisors is an integer number (53726148).

Almost surely, 2^513225251 is an apocalyptic number.

513225251 is a deficient number, since it is larger than the sum of its proper divisors (131488525).

513225251 is a wasteful number, since it uses less digits than its factorization.

513225251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605962 (or 605951 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 513225251 is about 22654.4752973888. The cubic root of 513225251 is about 800.6376431914.

Adding to 513225251 its reverse (152522315), we get a palindrome (665747566).

The spelling of 513225251 in words is "five hundred thirteen million, two hundred twenty-five thousand, two hundred fifty-one".