51065280 has 336 divisors, whose sum is σ = 213969600. Its totient is φ = 10911744.

The previous prime is 51065279. The next prime is 51065281. The reversal of 51065280 is 8256015.

51065280 is a `hidden beast` number, since 5 + 1 + 0 + 652 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51065279) and next prime (51065281).

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51065281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 342646 + ... + 342794.

Almost surely, 2^51065280 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 51065280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106984800).

51065280 is an abundant number, since it is smaller than the sum of its proper divisors (162904320).

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

51065280 is a wasteful number, since it uses less digits than its factorization.

51065280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51065280 is about 7145.9974811079. The cubic root of 51065280 is about 371.0011358015.

The spelling of 51065280 in words is "fifty-one million, sixty-five thousand, two hundred eighty".