51864879 has 8 divisors (see below), whose sum is σ = 75439872. Its totient is φ = 31433240.

The previous prime is 51864871. The next prime is 51864893. The reversal of 51864879 is 97846815.

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 51864879 - 2³ = 51864871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51864871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785799 + ... + 785864.

It is an arithmetic number, because the mean of its divisors is an integer number (9429984).

Almost surely, 2^51864879 is an apocalyptic number.

51864879 is a deficient number, since it is larger than the sum of its proper divisors (23574993).

51864879 is a wasteful number, since it uses less digits than its factorization.

51864879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571677.

The product of its digits is 483840, while the sum is 48.

The square root of 51864879 is about 7201.7275010931. The cubic root of 51864879 is about 372.9275399692.

The spelling of 51864879 in words is "fifty-one million, eight hundred sixty-four thousand, eight hundred seventy-nine".