51352513 has 4 divisors (see below), whose sum is σ = 51366868. Its totient is φ = 51338160.

The previous prime is 51352489. The next prime is 51352517. The reversal of 51352513 is 31525315.

51352513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31525315 = 5 ⋅6305063.

It can be written as a sum of positive squares in 2 ways, for example, as 41692849 + 9659664 = 6457^2 + 3108^2 .

It is a cyclic number.

It is not a de Polignac number, because 51352513 - 2¹⁷ = 51221441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51352517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2995 + ... + 10567.

It is an arithmetic number, because the mean of its divisors is an integer number (12841717).

Almost surely, 2^51352513 is an apocalyptic number.

It is an amenable number.

51352513 is a deficient number, since it is larger than the sum of its proper divisors (14355).

51352513 is an equidigital number, since it uses as much as digits as its factorization.

51352513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14354.

The product of its digits is 2250, while the sum is 25.

The square root of 51352513 is about 7166.0667733423. The cubic root of 51352513 is about 371.6954404941.

Adding to 51352513 its reverse (31525315), we get a palindrome (82877828).

The spelling of 51352513 in words is "fifty-one million, three hundred fifty-two thousand, five hundred thirteen".