51664210 has 64 divisors (see below), whose sum is σ = 107557632. Its totient is φ = 17715456.

The previous prime is 51664157. The next prime is 51664213. The reversal of 51664210 is 1246615.

It is not an unprimeable number, because it can be changed into a prime (51664213) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 110397 + ... + 110863.

It is an arithmetic number, because the mean of its divisors is an integer number (1680588).

Almost surely, 2^51664210 is an apocalyptic number.

51664210 is an abundant number, since it is smaller than the sum of its proper divisors (55893422).

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

51664210 is a wasteful number, since it uses less digits than its factorization.

51664210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 51664210 is about 7187.7819944681. The cubic root of 51664210 is about 372.4459570562.

The spelling of 51664210 in words is "fifty-one million, six hundred sixty-four thousand, two hundred ten".