51806967 has 8 divisors (see below), whose sum is σ = 69231600. Its totient is φ = 34460160.

The previous prime is 51806957. The next prime is 51806969. The reversal of 51806967 is 76960815.

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

It is not a de Polignac number, because 51806967 - 2¹² = 51802871 is a prime.

It is a Smith number, since the sum of its digits (42) 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 (51806969) 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, 17884 + ... + 20577.

It is an arithmetic number, because the mean of its divisors is an integer number (8653950).

Almost surely, 2^51806967 is an apocalyptic number.

51806967 is a deficient number, since it is larger than the sum of its proper divisors (17424633).

51806967 is a wasteful number, since it uses less digits than its factorization.

51806967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38913.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 51806967 is about 7197.7056761165. The cubic root of 51806967 is about 372.7886854209.

The spelling of 51806967 in words is "fifty-one million, eight hundred six thousand, nine hundred sixty-seven".