51696686 has 8 divisors (see below), whose sum is σ = 80916624. Its totient is φ = 24724480.

The previous prime is 51696683. The next prime is 51696691. The reversal of 51696686 is 68669615.

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 51696686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51696683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561875 + ... + 561966.

It is an arithmetic number, because the mean of its divisors is an integer number (10114578).

Almost surely, 2^51696686 is an apocalyptic number.

51696686 is a deficient number, since it is larger than the sum of its proper divisors (29219938).

51696686 is a wasteful number, since it uses less digits than its factorization.

51696686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123866.

The product of its digits is 466560, while the sum is 47.

The square root of 51696686 is about 7190.0407509276. The cubic root of 51696686 is about 372.5239802588.

The spelling of 51696686 in words is "fifty-one million, six hundred ninety-six thousand, six hundred eighty-six".