51855979 has 8 divisors (see below), whose sum is σ = 60642560. Its totient is φ = 43414056.

The previous prime is 51855943. The next prime is 51855989. The reversal of 51855979 is 97955815.

51855979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51855979 - 2¹¹ = 51853931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51855929) 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 7 ways as a sum of consecutive naturals, for example, 85839 + ... + 86440.

It is an arithmetic number, because the mean of its divisors is an integer number (7580320).

Almost surely, 2^51855979 is an apocalyptic number.

51855979 is a deficient number, since it is larger than the sum of its proper divisors (8786581).

51855979 is a wasteful number, since it uses less digits than its factorization.

51855979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172329.

The product of its digits is 567000, while the sum is 49.

The square root of 51855979 is about 7201.1095672820. The cubic root of 51855979 is about 372.9062073254.

The spelling of 51855979 in words is "fifty-one million, eight hundred fifty-five thousand, nine hundred seventy-nine".