51993056 has 48 divisors (see below), whose sum is σ = 106822800. Its totient is φ = 24880128.

The previous prime is 51993049. The next prime is 51993077. The reversal of 51993056 is 65039915.

It is a super-3 number, since 3×51993056³ (a number of 24 digits) contains 333 as substring.

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, 165956 + ... + 166268.

It is an arithmetic number, because the mean of its divisors is an integer number (2225475).

Almost surely, 2^51993056 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 51993056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53411400).

51993056 is an abundant number, since it is smaller than the sum of its proper divisors (54829744).

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

51993056 is a wasteful number, since it uses less digits than its factorization.

51993056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 51993056 is about 7210.6210550826. The cubic root of 51993056 is about 373.2345004822.

The spelling of 51993056 in words is "fifty-one million, nine hundred ninety-three thousand, fifty-six".