51516256 has 48 divisors (see below), whose sum is σ = 117164880. Its totient is φ = 22036480.

The previous prime is 51516221. The next prime is 51516271. The reversal of 51516256 is 65261515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680 + ... + 10288.

It is an arithmetic number, because the mean of its divisors is an integer number (2440935).

Almost surely, 2^51516256 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 51516256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58582440).

51516256 is an abundant number, since it is smaller than the sum of its proper divisors (65648624).

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

51516256 is a wasteful number, since it uses less digits than its factorization.

51516256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8647 (or 8639 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 51516256 is about 7177.4825670286. The cubic root of 51516256 is about 372.0900849390.

The spelling of 51516256 in words is "fifty-one million, five hundred sixteen thousand, two hundred fifty-six".