51617863 has 8 divisors (see below), whose sum is σ = 56649600. Its totient is φ = 46642680.

The previous prime is 51617833. The next prime is 51617873. The reversal of 51617863 is 36871615.

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 51617863 - 2¹⁷ = 51486791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51617833) 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, 12213 + ... + 15886.

It is an arithmetic number, because the mean of its divisors is an integer number (7081200).

Almost surely, 2^51617863 is an apocalyptic number.

51617863 is a deficient number, since it is larger than the sum of its proper divisors (5031737).

51617863 is a wasteful number, since it uses less digits than its factorization.

51617863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28277.

The product of its digits is 30240, while the sum is 37.

The square root of 51617863 is about 7184.5572584537. The cubic root of 51617863 is about 372.3345522941.

The spelling of 51617863 in words is "fifty-one million, six hundred seventeen thousand, eight hundred sixty-three".