51349709 has 8 divisors (see below), whose sum is σ = 52567680. Its totient is φ = 50137056.

The previous prime is 51349703. The next prime is 51349729. The reversal of 51349709 is 90794315.

It is a happy number.

51349709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51349709 - 2⁸ = 51349453 is a prime.

It is a super-2 number, since 2×51349709² = 5273585228769362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51349703) 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 7 ways as a sum of consecutive naturals, for example, 23537 + ... + 25625.

It is an arithmetic number, because the mean of its divisors is an integer number (6570960).

Almost surely, 2^51349709 is an apocalyptic number.

It is an amenable number.

51349709 is a deficient number, since it is larger than the sum of its proper divisors (1217971).

51349709 is a wasteful number, since it uses less digits than its factorization.

51349709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 51349709 is about 7165.8711263879. The cubic root of 51349709 is about 371.6886751453.

The spelling of 51349709 in words is "fifty-one million, three hundred forty-nine thousand, seven hundred nine".