51969678 has 16 divisors (see below), whose sum is σ = 105701760. Its totient is φ = 17029496.

The previous prime is 51969667. The next prime is 51969679. The reversal of 51969678 is 87696915.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51969678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51969679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73050 + ... + 73757.

It is an arithmetic number, because the mean of its divisors is an integer number (6606360).

Almost surely, 2^51969678 is an apocalyptic number.

51969678 is an abundant number, since it is smaller than the sum of its proper divisors (53732082).

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

51969678 is a wasteful number, since it uses less digits than its factorization.

51969678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146871.

The product of its digits is 816480, while the sum is 51.

The square root of 51969678 is about 7208.9997919268. Note that the first 3 decimals coincide. The cubic root of 51969678 is about 373.1785520863.

The spelling of 51969678 in words is "fifty-one million, nine hundred sixty-nine thousand, six hundred seventy-eight".