51016648 has 8 divisors (see below), whose sum is σ = 95656230. Its totient is φ = 25508320.

The previous prime is 51016639. The next prime is 51016649. The reversal of 51016648 is 84661015.

It can be written as a sum of positive squares in only one way, i.e., 50722884 + 293764 = 7122^2 + 542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51016649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3188533 + ... + 3188548.

Almost surely, 2^51016648 is an apocalyptic number.

It is an amenable number.

51016648 is a deficient number, since it is larger than the sum of its proper divisors (44639582).

51016648 is a wasteful number, since it uses less digits than its factorization.

51016648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6377087 (or 6377083 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 51016648 is about 7142.5939265788. The cubic root of 51016648 is about 370.8833241307.

The spelling of 51016648 in words is "fifty-one million, sixteen thousand, six hundred forty-eight".