51465866 has 8 divisors (see below), whose sum is σ = 77433024. Its totient is φ = 25654860.

The previous prime is 51465857. The next prime is 51465899. The reversal of 51465866 is 66856415.

It is a happy number.

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

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, 38210 + ... + 39533.

It is an arithmetic number, because the mean of its divisors is an integer number (9679128).

Almost surely, 2^51465866 is an apocalyptic number.

51465866 is a deficient number, since it is larger than the sum of its proper divisors (25967158).

51465866 is a wasteful number, since it uses less digits than its factorization.

51465866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78076.

The product of its digits is 172800, while the sum is 41.

The square root of 51465866 is about 7173.9714245319. The cubic root of 51465866 is about 371.9687268966.

The spelling of 51465866 in words is "fifty-one million, four hundred sixty-five thousand, eight hundred sixty-six".