51079513 has 4 divisors (see below), whose sum is σ = 51321808. Its totient is φ = 50837220.

The previous prime is 51079489. The next prime is 51079517. The reversal of 51079513 is 31597015.

51079513 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31597015 = 5 ⋅6319403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51079513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51079517) 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, 120831 + ... + 121252.

It is an arithmetic number, because the mean of its divisors is an integer number (12830452).

Almost surely, 2^51079513 is an apocalyptic number.

It is an amenable number.

51079513 is a deficient number, since it is larger than the sum of its proper divisors (242295).

51079513 is a wasteful number, since it uses less digits than its factorization.

51079513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242294.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 51079513 is about 7146.9932838922. The cubic root of 51079513 is about 371.0356012847.

The spelling of 51079513 in words is "fifty-one million, seventy-nine thousand, five hundred thirteen".