51403866 has 8 divisors (see below), whose sum is σ = 102807744. Its totient is φ = 17134620.

The previous prime is 51403831. The next prime is 51403871. The reversal of 51403866 is 66830415.

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

51403866 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4283650 + ... + 4283661.

It is an arithmetic number, because the mean of its divisors is an integer number (12850968).

Almost surely, 2^51403866 is an apocalyptic number.

51403866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51403866 is a wasteful number, since it uses less digits than its factorization.

51403866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8567316.

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

The square root of 51403866 is about 7169.6489453808. The cubic root of 51403866 is about 371.8192988719.

The spelling of 51403866 in words is "fifty-one million, four hundred three thousand, eight hundred sixty-six".