51644166 has 32 divisors (see below), whose sum is σ = 124258560. Its totient is φ = 13978656.

The previous prime is 51644111. The next prime is 51644183. The reversal of 51644166 is 66144615.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31561 + ... + 33156.

It is an arithmetic number, because the mean of its divisors is an integer number (3883080).

Almost surely, 2^51644166 is an apocalyptic number.

51644166 is an abundant number, since it is smaller than the sum of its proper divisors (72614394).

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

51644166 is a wasteful number, since it uses less digits than its factorization.

51644166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64748.

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

The square root of 51644166 is about 7186.3875486923. The cubic root of 51644166 is about 372.3977852664.

The spelling of 51644166 in words is "fifty-one million, six hundred forty-four thousand, one hundred sixty-six".