51986592 has 144 divisors (see below), whose sum is σ = 171243072. Its totient is φ = 14653440.

The previous prime is 51986581. The next prime is 51986609. The reversal of 51986592 is 29568915.

51986592 is a `hidden beast` number, since 51 + 9 + 8 + 6 + 592 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

Its product of digits (194400) is a multiple of the sum of its prime divisors (360).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215592 + ... + 215832.

It is an arithmetic number, because the mean of its divisors is an integer number (1189188).

Almost surely, 2^51986592 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 51986592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85621536).

51986592 is an abundant number, since it is smaller than the sum of its proper divisors (119256480).

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

51986592 is a wasteful number, since it uses less digits than its factorization.

51986592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 360 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 51986592 is about 7210.1728134629. The cubic root of 51986592 is about 373.2190324692.

The spelling of 51986592 in words is "fifty-one million, nine hundred eighty-six thousand, five hundred ninety-two".