51516983 has 12 divisors (see below), whose sum is σ = 60137280. Its totient is φ = 44003232.

The previous prime is 51516979. The next prime is 51516989. The reversal of 51516983 is 38961515.

It is not a de Polignac number, because 51516983 - 2² = 51516979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51516989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13658 + ... + 17016.

It is an arithmetic number, because the mean of its divisors is an integer number (5011440).

Almost surely, 2^51516983 is an apocalyptic number.

51516983 is a deficient number, since it is larger than the sum of its proper divisors (8620297).

51516983 is a wasteful number, since it uses less digits than its factorization.

51516983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686 (or 3679 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 51516983 is about 7177.5332113478. The cubic root of 51516983 is about 372.0918352488.

The spelling of 51516983 in words is "fifty-one million, five hundred sixteen thousand, nine hundred eighty-three".