51406863 has 8 divisors (see below), whose sum is σ = 71522688. Its totient is φ = 32781144.

The previous prime is 51406853. The next prime is 51406867. The reversal of 51406863 is 36860415.

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

It is a de Polignac number, because none of the positive numbers 2^k-51406863 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51406867) 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, 372445 + ... + 372582.

It is an arithmetic number, because the mean of its divisors is an integer number (8940336).

Almost surely, 2^51406863 is an apocalyptic number.

51406863 is a deficient number, since it is larger than the sum of its proper divisors (20115825).

51406863 is a wasteful number, since it uses less digits than its factorization.

51406863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745053.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 51406863 is about 7169.8579483836. The cubic root of 51406863 is about 371.8265247926.

The spelling of 51406863 in words is "fifty-one million, four hundred six thousand, eight hundred sixty-three".