51879487 has 16 divisors (see below), whose sum is σ = 57867264. Its totient is φ = 46116000.

The previous prime is 51879479. The next prime is 51879511. The reversal of 51879487 is 78497815.

It is a cyclic number.

It is not a de Polignac number, because 51879487 - 2³ = 51879479 is a prime.

It is a Duffinian number.

Its product of digits (564480) is a multiple of the sum of its prime divisors (630).

It is a self number, because there is not a number n which added to its sum of digits gives 51879487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51879407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141178 + ... + 141544.

It is an arithmetic number, because the mean of its divisors is an integer number (3616704).

Almost surely, 2^51879487 is an apocalyptic number.

51879487 is a deficient number, since it is larger than the sum of its proper divisors (5987777).

51879487 is a wasteful number, since it uses less digits than its factorization.

51879487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630.

The product of its digits is 564480, while the sum is 49.

The square root of 51879487 is about 7202.7416307959. The cubic root of 51879487 is about 372.9625489787.

The spelling of 51879487 in words is "fifty-one million, eight hundred seventy-nine thousand, four hundred eighty-seven".