51481168 has 40 divisors (see below), whose sum is σ = 107885952. Its totient is φ = 23705088.

The previous prime is 51481163. The next prime is 51481181. The reversal of 51481168 is 86118415.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51481163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10771 + ... + 14797.

Almost surely, 2^51481168 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 51481168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53942976).

51481168 is an abundant number, since it is smaller than the sum of its proper divisors (56404784).

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

51481168 is a wasteful number, since it uses less digits than its factorization.

51481168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099 (or 4093 counting only the distinct ones).

The product of its digits is 7680, while the sum is 34.

The square root of 51481168 is about 7175.0378396215. The cubic root of 51481168 is about 372.0055882307.

The spelling of 51481168 in words is "fifty-one million, four hundred eighty-one thousand, one hundred sixty-eight".