51392 has 28 divisors (see below), whose sum is σ = 112776. Its totient is φ = 23040.

The previous prime is 51383. The next prime is 51407. The reversal of 51392 is 29315.

It is a super-2 number, since 2×51392² = 5282275328, which contains 22 as substring.

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 51392.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668 + ... + 740.

2⁵¹³⁹² 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 51392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56388).

51392 is an abundant number, since it is smaller than the sum of its proper divisors (61384).

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

51392 is a wasteful number, since it uses less digits than its factorization.

51392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 86 counting only the distinct ones).

The product of its digits is 270, while the sum is 20.

The square root of 51392 is about 226.6980370449. The cubic root of 51392 is about 37.1790686580.

The spelling of 51392 in words is "fifty-one thousand, three hundred ninety-two".