51298513 has 4 divisors (see below), whose sum is σ = 58626880. Its totient is φ = 43970148.

The previous prime is 51298501. The next prime is 51298523. The reversal of 51298513 is 31589215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51298513 is a prime.

It is a super-2 number, since 2×51298513² = 5263074872022338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51298523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3664173 + ... + 3664186.

It is an arithmetic number, because the mean of its divisors is an integer number (14656720).

Almost surely, 2^51298513 is an apocalyptic number.

It is an amenable number.

51298513 is a deficient number, since it is larger than the sum of its proper divisors (7328367).

51298513 is an equidigital number, since it uses as much as digits as its factorization.

51298513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7328366.

The product of its digits is 10800, while the sum is 34.

The square root of 51298513 is about 7162.2980250755. The cubic root of 51298513 is about 371.5651087137.

The spelling of 51298513 in words is "fifty-one million, two hundred ninety-eight thousand, five hundred thirteen".