51000513 has 8 divisors (see below), whose sum is σ = 68078976. Its totient is φ = 33961200.

The previous prime is 51000511. The next prime is 51000539. The reversal of 51000513 is 31500015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51000513 - 2¹ = 51000511 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51000492 and 51000501.

It is not an unprimeable number, because it can be changed into a prime (51000511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6598 + ... + 12063.

It is an arithmetic number, because the mean of its divisors is an integer number (8509872).

Almost surely, 2^51000513 is an apocalyptic number.

It is an amenable number.

51000513 is a deficient number, since it is larger than the sum of its proper divisors (17078463).

51000513 is a wasteful number, since it uses less digits than its factorization.

51000513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19575.

The product of its (nonzero) digits is 75, while the sum is 15.

The square root of 51000513 is about 7141.4643456367. The cubic root of 51000513 is about 370.8442203371.

Adding to 51000513 its reverse (31500015), we get a palindrome (82500528).

The spelling of 51000513 in words is "fifty-one million, five hundred thirteen", and thus it is an aban number.