51712668 has 90 divisors (see below), whose sum is σ = 155529528. Its totient is φ = 14677200.

The previous prime is 51712667. The next prime is 51712679. The reversal of 51712668 is 86621715.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51712663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 342393 + ... + 342543.

Almost surely, 2^51712668 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 51712668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77764764).

51712668 is an abundant number, since it is smaller than the sum of its proper divisors (103816860).

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

51712668 is a wasteful number, since it uses less digits than its factorization.

51712668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 163 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 51712668 is about 7191.1520634736. The cubic root of 51712668 is about 372.5623648265.

The spelling of 51712668 in words is "fifty-one million, seven hundred twelve thousand, six hundred sixty-eight".