51395568 has 80 divisors (see below), whose sum is σ = 152894976. Its totient is φ = 14572800.

The previous prime is 51395563. The next prime is 51395579. The reversal of 51395568 is 86559315.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51395563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50230 + ... + 51242.

Almost surely, 2^51395568 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 51395568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76447488).

51395568 is an abundant number, since it is smaller than the sum of its proper divisors (101499408).

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

51395568 is a wasteful number, since it uses less digits than its factorization.

51395568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1176 counting only the distinct ones).

The product of its digits is 162000, while the sum is 42.

The square root of 51395568 is about 7169.0702326034. The cubic root of 51395568 is about 371.7992905028.

The spelling of 51395568 in words is "fifty-one million, three hundred ninety-five thousand, five hundred sixty-eight".