51550164 has 36 divisors (see below), whose sum is σ = 133084224. Its totient is φ = 16817232.

The previous prime is 51550159. The next prime is 51550181. The reversal of 51550164 is 46105515.

It is a happy number.

51550164 is a `hidden beast` number, since 51 + 550 + 1 + 64 = 666.

51550164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

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, 13542 + ... + 16925.

It is an arithmetic number, because the mean of its divisors is an integer number (3696784).

Almost surely, 2^51550164 is an apocalyptic number.

It is an amenable number.

51550164 is an abundant number, since it is smaller than the sum of its proper divisors (81534060).

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

51550164 is a wasteful number, since it uses less digits than its factorization.

51550164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30524 (or 30519 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 51550164 is about 7179.8442880051. The cubic root of 51550164 is about 372.1717035999.

Adding to 51550164 its reverse (46105515), we get a palindrome (97655679).

The spelling of 51550164 in words is "fifty-one million, five hundred fifty thousand, one hundred sixty-four".