51006463 has 4 divisors (see below), whose sum is σ = 51209928. Its totient is φ = 50803000.

The previous prime is 51006457. The next prime is 51006481. The reversal of 51006463 is 36460015.

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

It is a cyclic number.

It is not a de Polignac number, because 51006463 - 2²⁵ = 17452031 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 (51006413) 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, 101356 + ... + 101857.

It is an arithmetic number, because the mean of its divisors is an integer number (12802482).

Almost surely, 2^51006463 is an apocalyptic number.

51006463 is a deficient number, since it is larger than the sum of its proper divisors (203465).

51006463 is a wasteful number, since it uses less digits than its factorization.

51006463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203464.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 51006463 is about 7141.8809147171. The cubic root of 51006463 is about 370.8586413510.

Adding to 51006463 its reverse (36460015), we get a palindrome (87466478).

The spelling of 51006463 in words is "fifty-one million, six thousand, four hundred sixty-three".