51999714 has 48 divisors (see below), whose sum is σ = 121867200. Its totient is φ = 15929568.

The previous prime is 51999707. The next prime is 51999721. The reversal of 51999714 is 41799915.

It is an interprime number because it is at equal distance from previous prime (51999707) and next prime (51999721).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 51999714.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83697 + ... + 84315.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^51999714 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51999714, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60933600).

51999714 is an abundant number, since it is smaller than the sum of its proper divisors (69867486).

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

51999714 is a wasteful number, since it uses less digits than its factorization.

51999714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 996 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 51999714 is about 7211.0827203687. The cubic root of 51999714 is about 373.2504313868.

The spelling of 51999714 in words is "fifty-one million, nine hundred ninety-nine thousand, seven hundred fourteen".