51864563 has 8 divisors (see below), whose sum is σ = 54240000. Its totient is φ = 49499208.

The previous prime is 51864559. The next prime is 51864583. The reversal of 51864563 is 36546815.

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 51864563 - 2² = 51864559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51864583) 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, 9218 + ... + 13736.

It is an arithmetic number, because the mean of its divisors is an integer number (6780000).

Almost surely, 2^51864563 is an apocalyptic number.

51864563 is a deficient number, since it is larger than the sum of its proper divisors (2375437).

51864563 is a wasteful number, since it uses less digits than its factorization.

51864563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041.

The product of its digits is 86400, while the sum is 38.

The square root of 51864563 is about 7201.7055618791. The cubic root of 51864563 is about 372.9267825823.

The spelling of 51864563 in words is "fifty-one million, eight hundred sixty-four thousand, five hundred sixty-three".