51650136 has 72 divisors (see below), whose sum is σ = 145962180. Its totient is φ = 17111088.

The previous prime is 51650129. The next prime is 51650141. The reversal of 51650136 is 63105615.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

51650136 is a `hidden beast` number, since 5 + 1 + 650 + 1 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 316791 + ... + 316953.

Almost surely, 2^51650136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51650136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72981090).

51650136 is an abundant number, since it is smaller than the sum of its proper divisors (94312044).

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

51650136 is an equidigital number, since it uses as much as digits as its factorization.

51650136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51650136 is about 7186.8029053258. The cubic root of 51650136 is about 372.4121342838.

The spelling of 51650136 in words is "fifty-one million, six hundred fifty thousand, one hundred thirty-six".