51866087 has 8 divisors (see below), whose sum is σ = 63835296. Its totient is φ = 41036832.

The previous prime is 51866083. The next prime is 51866147. The reversal of 51866087 is 78066815.

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

It is a cyclic number.

It is not a de Polignac number, because 51866087 - 2² = 51866083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51866083) 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, 284888 + ... + 285069.

It is an arithmetic number, because the mean of its divisors is an integer number (7979412).

Almost surely, 2^51866087 is an apocalyptic number.

51866087 is a deficient number, since it is larger than the sum of its proper divisors (11969209).

51866087 is a wasteful number, since it uses less digits than its factorization.

51866087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569977.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 51866087 is about 7201.8113693709. The cubic root of 51866087 is about 372.9304352680.

The spelling of 51866087 in words is "fifty-one million, eight hundred sixty-six thousand, eighty-seven".