51305879 has 4 divisors (see below), whose sum is σ = 51813960. Its totient is φ = 50797800.

The previous prime is 51305861. The next prime is 51305897. The reversal of 51305879 is 97850315.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51305861) and next prime (51305897).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51305879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51005879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253889 + ... + 254090.

It is an arithmetic number, because the mean of its divisors is an integer number (12953490).

Almost surely, 2^51305879 is an apocalyptic number.

51305879 is a deficient number, since it is larger than the sum of its proper divisors (508081).

51305879 is a wasteful number, since it uses less digits than its factorization.

51305879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508080.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 51305879 is about 7162.8122270516. The cubic root of 51305879 is about 371.5828923195.

The spelling of 51305879 in words is "fifty-one million, three hundred five thousand, eight hundred seventy-nine".