51664700 has 36 divisors (see below), whose sum is σ = 118711152. Its totient is φ = 19449600.

The previous prime is 51664687. The next prime is 51664733. The reversal of 51664700 is 746615.

51664700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13496 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (3297532).

Almost surely, 2^51664700 is an apocalyptic number.

51664700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51664700 is an abundant number, since it is smaller than the sum of its proper divisors (67046452).

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

51664700 is a wasteful number, since it uses less digits than its factorization.

51664700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30422 (or 30415 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 51664700 is about 7187.8160800065. The cubic root of 51664700 is about 372.4471345183.

The spelling of 51664700 in words is "fifty-one million, six hundred sixty-four thousand, seven hundred".