51699760 has 160 divisors (see below), whose sum is σ = 149276160. Its totient is φ = 16257024.

The previous prime is 51699749. The next prime is 51699773. The reversal of 51699760 is 6799615.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 457464 + ... + 457576.

It is an arithmetic number, because the mean of its divisors is an integer number (932976).

Almost surely, 2^51699760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51699760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74638080).

51699760 is an abundant number, since it is smaller than the sum of its proper divisors (97576400).

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

51699760 is a wasteful number, since it uses less digits than its factorization.

51699760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 51699760 is about 7190.2545156622. The cubic root of 51699760 is about 372.5313638141.

The spelling of 51699760 in words is "fifty-one million, six hundred ninety-nine thousand, seven hundred sixty".