51346240 has 112 divisors (see below), whose sum is σ = 138257280. Its totient is φ = 17991680.

The previous prime is 51346223. The next prime is 51346247. The reversal of 51346240 is 4264315.

51346240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51346247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101829 + ... + 102331.

It is an arithmetic number, because the mean of its divisors is an integer number (1234440).

Almost surely, 2^51346240 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 51346240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69128640).

51346240 is an abundant number, since it is smaller than the sum of its proper divisors (86911040).

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

51346240 is a wasteful number, since it uses less digits than its factorization.

51346240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 51346240 is about 7165.6290721750. The cubic root of 51346240 is about 371.6803049774.

The spelling of 51346240 in words is "fifty-one million, three hundred forty-six thousand, two hundred forty".