51765248 has 56 divisors (see below), whose sum is σ = 106161840. Its totient is φ = 25231360.

The previous prime is 51765199. The next prime is 51765277. The reversal of 51765248 is 84256715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581588 + ... + 581676.

Almost surely, 2^51765248 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 51765248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53080920).

51765248 is an abundant number, since it is smaller than the sum of its proper divisors (54396592).

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

51765248 is an frugal number, since it uses more digits than its factorization.

51765248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 162 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 51765248 is about 7194.8070161749. The cubic root of 51765248 is about 372.6885923987.

The spelling of 51765248 in words is "fifty-one million, seven hundred sixty-five thousand, two hundred forty-eight".