51365248 has 48 divisors (see below), whose sum is σ = 112219380. Its totient is φ = 23225600.

The previous prime is 51365221. The next prime is 51365261. The reversal of 51365248 is 84256315.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268833 + ... + 269023.

Almost surely, 2^51365248 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 51365248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56109690).

51365248 is an abundant number, since it is smaller than the sum of its proper divisors (60854132).

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

51365248 is an equidigital number, since it uses as much as digits as its factorization.

51365248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 204 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 51365248 is about 7166.9552810102. The cubic root of 51365248 is about 371.7261637565.

The spelling of 51365248 in words is "fifty-one million, three hundred sixty-five thousand, two hundred forty-eight".