51568791 has 16 divisors (see below), whose sum is σ = 70087680. Its totient is φ = 33719840.

The previous prime is 51568771. The next prime is 51568801. The reversal of 51568791 is 19786515.

It is a cyclic number.

It is not a de Polignac number, because 51568791 - 2¹³ = 51560599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51568721) 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, 50401 + ... + 51413.

It is an arithmetic number, because the mean of its divisors is an integer number (4380480).

Almost surely, 2^51568791 is an apocalyptic number.

51568791 is a deficient number, since it is larger than the sum of its proper divisors (18518889).

51568791 is a wasteful number, since it uses less digits than its factorization.

51568791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326.

The product of its digits is 75600, while the sum is 42.

The square root of 51568791 is about 7181.1413438255. The cubic root of 51568791 is about 372.2165247150.

The spelling of 51568791 in words is "fifty-one million, five hundred sixty-eight thousand, seven hundred ninety-one".