51909344 has 24 divisors (see below), whose sum is σ = 106641360. Its totient is φ = 24825856.

The previous prime is 51909343. The next prime is 51909359. The reversal of 51909344 is 44390915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51909343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34529 + ... + 36000.

It is an arithmetic number, because the mean of its divisors is an integer number (4443390).

Almost surely, 2^51909344 is an apocalyptic number.

It is an amenable number.

51909344 is an abundant number, since it is smaller than the sum of its proper divisors (54732016).

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

51909344 is a wasteful number, since it uses less digits than its factorization.

51909344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70562 (or 70554 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 51909344 is about 7204.8139462446. The cubic root of 51909344 is about 373.0340827579.

The spelling of 51909344 in words is "fifty-one million, nine hundred nine thousand, three hundred forty-four".