513145251 has 12 divisors (see below), whose sum is σ = 751364328. Its totient is φ = 337410144.

The previous prime is 513145247. The next prime is 513145271. The reversal of 513145251 is 152541315.

513145251 is a `hidden beast` number, since 5 + 131 + 4 + 525 + 1 = 666.

It is not a de Polignac number, because 513145251 - 2² = 513145247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513145231) 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, 389865 + ... + 391178.

It is an arithmetic number, because the mean of its divisors is an integer number (62613694).

Almost surely, 2^513145251 is an apocalyptic number.

513145251 is a deficient number, since it is larger than the sum of its proper divisors (238219077).

513145251 is a wasteful number, since it uses less digits than its factorization.

513145251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781122 (or 781119 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 513145251 is about 22652.7095730290. The cubic root of 513145251 is about 800.5960407049.

Adding to 513145251 its reverse (152541315), we get a palindrome (665686566).

It can be divided in two parts, 51314 and 5251, that added together give a palindrome (56565).

The spelling of 513145251 in words is "five hundred thirteen million, one hundred forty-five thousand, two hundred fifty-one".