51597568 has 72 divisors (see below), whose sum is σ = 114349536. Its totient is φ = 23040000.

The previous prime is 51597563. The next prime is 51597577. The reversal of 51597568 is 86579515.

It is not an unprimeable number, because it can be changed into a prime (51597563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205443 + ... + 205693.

It is an arithmetic number, because the mean of its divisors is an integer number (1588188).

Almost surely, 2^51597568 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 51597568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57174768).

51597568 is an abundant number, since it is smaller than the sum of its proper divisors (62751968).

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

51597568 is a wasteful number, since it uses less digits than its factorization.

51597568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 337 counting only the distinct ones).

The product of its digits is 378000, while the sum is 46.

The square root of 51597568 is about 7183.1447152344. The cubic root of 51597568 is about 372.2857479986.

The spelling of 51597568 in words is "fifty-one million, five hundred ninety-seven thousand, five hundred sixty-eight".