51651576 has 96 divisors (see below), whose sum is σ = 155984400. Its totient is φ = 15344640.

The previous prime is 51651571. The next prime is 51651599. The reversal of 51651576 is 67515615.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51651576.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22146 + ... + 24366.

Almost surely, 2^51651576 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 51651576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77992200).

51651576 is an abundant number, since it is smaller than the sum of its proper divisors (104332824).

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

51651576 is a wasteful number, since it uses less digits than its factorization.

51651576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269 (or 2262 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 51651576 is about 7186.9030882571. The cubic root of 51651576 is about 372.4155951878.

The spelling of 51651576 in words is "fifty-one million, six hundred fifty-one thousand, five hundred seventy-six".