51329866 has 8 divisors (see below), whose sum is σ = 87994080. Its totient is φ = 21998508.

The previous prime is 51329857. The next prime is 51329869. The reversal of 51329866 is 66892315.

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

It is not an unprimeable number, because it can be changed into a prime (51329869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833196 + ... + 1833223.

It is an arithmetic number, because the mean of its divisors is an integer number (10999260).

Almost surely, 2^51329866 is an apocalyptic number.

51329866 is a deficient number, since it is larger than the sum of its proper divisors (36664214).

51329866 is a wasteful number, since it uses less digits than its factorization.

51329866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666428.

The product of its digits is 77760, while the sum is 40.

The square root of 51329866 is about 7164.4864435631. The cubic root of 51329866 is about 371.6407919229.

The spelling of 51329866 in words is "fifty-one million, three hundred twenty-nine thousand, eight hundred sixty-six".