51682807 has 4 divisors (see below), whose sum is σ = 56381256. Its totient is φ = 46984360.

The previous prime is 51682801. The next prime is 51682823. The reversal of 51682807 is 70828615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51682807 is a prime.

It is a super-2 number, since 2×51682807² = 5342225078798498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51682801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2349208 + ... + 2349229.

It is an arithmetic number, because the mean of its divisors is an integer number (14095314).

Almost surely, 2^51682807 is an apocalyptic number.

51682807 is a deficient number, since it is larger than the sum of its proper divisors (4698449).

51682807 is a wasteful number, since it uses less digits than its factorization.

51682807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698448.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 51682807 is about 7189.0755316661. The cubic root of 51682807 is about 372.4906401264.

The spelling of 51682807 in words is "fifty-one million, six hundred eighty-two thousand, eight hundred seven".