51278579 has 16 divisors (see below), whose sum is σ = 59460480. Its totient is φ = 43704960.

The previous prime is 51278561. The next prime is 51278621. The reversal of 51278579 is 97587215.

It is not a de Polignac number, because 51278579 - 2⁸ = 51278323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51278179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82532 + ... + 83150.

It is an arithmetic number, because the mean of its divisors is an integer number (3716280).

Almost surely, 2^51278579 is an apocalyptic number.

51278579 is a deficient number, since it is larger than the sum of its proper divisors (8181901).

51278579 is a wasteful number, since it uses less digits than its factorization.

51278579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090.

The product of its digits is 176400, while the sum is 44.

The square root of 51278579 is about 7160.9062973900. The cubic root of 51278579 is about 371.5169738650.

The spelling of 51278579 in words is "fifty-one million, two hundred seventy-eight thousand, five hundred seventy-nine".