51709444 has 12 divisors (see below), whose sum is σ = 95814684. Its totient is φ = 24333824.

The previous prime is 51709423. The next prime is 51709481. The reversal of 51709444 is 44490715.

It can be written as a sum of positive squares in 2 ways, for example, as 48469444 + 3240000 = 6962^2 + 1800^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 380149 + ... + 380284.

It is an arithmetic number, because the mean of its divisors is an integer number (7984557).

Almost surely, 2^51709444 is an apocalyptic number.

It is an amenable number.

51709444 is a deficient number, since it is larger than the sum of its proper divisors (44105240).

51709444 is a wasteful number, since it uses less digits than its factorization.

51709444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760454 (or 760452 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 51709444 is about 7190.9278956196. The cubic root of 51709444 is about 372.5546222619.

The spelling of 51709444 in words is "fifty-one million, seven hundred nine thousand, four hundred forty-four".