51585648 has 20 divisors (see below), whose sum is σ = 133263048. Its totient is φ = 17195200.

The previous prime is 51585641. The next prime is 51585661. The reversal of 51585648 is 84658515.

It is a super-2 number, since 2×51585648² = 5322158159159808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51585641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537303 + ... + 537398.

Almost surely, 2^51585648 is an apocalyptic number.

It is an amenable number.

51585648 is an abundant number, since it is smaller than the sum of its proper divisors (81677400).

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

51585648 is a wasteful number, since it uses less digits than its factorization.

51585648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074712 (or 1074706 counting only the distinct ones).

The product of its digits is 192000, while the sum is 42.

The square root of 51585648 is about 7182.3149471462. The cubic root of 51585648 is about 372.2570774749.

The spelling of 51585648 in words is "fifty-one million, five hundred eighty-five thousand, six hundred forty-eight".