51326817 has 8 divisors (see below), whose sum is σ = 68697024. Its totient is φ = 34087248.

The previous prime is 51326813. The next prime is 51326819. The reversal of 51326817 is 71862315.

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

It is not a de Polignac number, because 51326817 - 2² = 51326813 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51326813) 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, 31738 + ... + 33315.

It is an arithmetic number, because the mean of its divisors is an integer number (8587128).

Almost surely, 2^51326817 is an apocalyptic number.

It is an amenable number.

51326817 is a deficient number, since it is larger than the sum of its proper divisors (17370207).

51326817 is a wasteful number, since it uses less digits than its factorization.

51326817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65319.

The product of its digits is 10080, while the sum is 33.

The square root of 51326817 is about 7164.2736547399. The cubic root of 51326817 is about 371.6334332751.

The spelling of 51326817 in words is "fifty-one million, three hundred twenty-six thousand, eight hundred seventeen".