51565964 has 12 divisors (see below), whose sum is σ = 95548824. Its totient is φ = 24266304.

The previous prime is 51565963. The next prime is 51565967. The reversal of 51565964 is 46956515.

It is not an unprimeable number, because it can be changed into a prime (51565963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379094 + ... + 379229.

It is an arithmetic number, because the mean of its divisors is an integer number (7962402).

Almost surely, 2^51565964 is an apocalyptic number.

It is an amenable number.

51565964 is a deficient number, since it is larger than the sum of its proper divisors (43982860).

51565964 is a wasteful number, since it uses less digits than its factorization.

51565964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758344 (or 758342 counting only the distinct ones).

The product of its digits is 162000, while the sum is 41.

The square root of 51565964 is about 7180.9445061217. The cubic root of 51565964 is about 372.2097229568.

The spelling of 51565964 in words is "fifty-one million, five hundred sixty-five thousand, nine hundred sixty-four".