51455779 has 8 divisors (see below), whose sum is σ = 52848432. Its totient is φ = 50069760.

The previous prime is 51455777. The next prime is 51455837. The reversal of 51455779 is 97755415.

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

It is a cyclic number.

It is not a de Polignac number, because 51455779 - 2¹ = 51455777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51455771) 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 7 ways as a sum of consecutive naturals, for example, 16747 + ... + 19579.

It is an arithmetic number, because the mean of its divisors is an integer number (6606054).

Almost surely, 2^51455779 is an apocalyptic number.

51455779 is a deficient number, since it is larger than the sum of its proper divisors (1392653).

51455779 is a wasteful number, since it uses less digits than its factorization.

51455779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317.

The product of its digits is 220500, while the sum is 43.

The square root of 51455779 is about 7173.2683624691. The cubic root of 51455779 is about 371.9444240982.

The spelling of 51455779 in words is "fifty-one million, four hundred fifty-five thousand, seven hundred seventy-nine".