51689306 has 8 divisors (see below), whose sum is σ = 77564640. Its totient is φ = 25834428.

The previous prime is 51689279. The next prime is 51689317. The reversal of 51689306 is 60398615.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51689306.

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, 6305 + ... + 11963.

It is an arithmetic number, because the mean of its divisors is an integer number (9695580).

Almost surely, 2^51689306 is an apocalyptic number.

51689306 is a deficient number, since it is larger than the sum of its proper divisors (25875334).

51689306 is a wasteful number, since it uses less digits than its factorization.

51689306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 51689306 is about 7189.5275227236. The cubic root of 51689306 is about 372.5062527665.

The spelling of 51689306 in words is "fifty-one million, six hundred eighty-nine thousand, three hundred six".