51709446 has 24 divisors (see below), whose sum is σ = 114771384. Its totient is φ = 16815840.

The previous prime is 51709423. The next prime is 51709481. The reversal of 51709446 is 64490715.

It is a self number, because there is not a number n which added to its sum of digits gives 51709446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34296 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (4782141).

Almost surely, 2^51709446 is an apocalyptic number.

51709446 is an abundant number, since it is smaller than the sum of its proper divisors (63061938).

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

51709446 is a wasteful number, since it uses less digits than its factorization.

51709446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70116 (or 70113 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 51709446 is about 7190.9280346837. The cubic root of 51709446 is about 372.5546270651.

The spelling of 51709446 in words is "fifty-one million, seven hundred nine thousand, four hundred forty-six".