51917983 has 18 divisors (see below), whose sum is σ = 59776584. Its totient is φ = 45062784.

The previous prime is 51917977. The next prime is 51918001. The reversal of 51917983 is 38971915.

51917983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51917983 - 2⁵ = 51917951 is a prime.

It is a super-4 number, since 4×51917983⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51917903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 48310 + ... + 49372.

Almost surely, 2^51917983 is an apocalyptic number.

51917983 is a deficient number, since it is larger than the sum of its proper divisors (7858601).

51917983 is a wasteful number, since it uses less digits than its factorization.

51917983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1093 counting only the distinct ones).

The product of its digits is 68040, while the sum is 43.

The square root of 51917983 is about 7205.4134510103. The cubic root of 51917983 is about 373.0547756457.

It can be divided in two parts, 51917 and 983, that added together give a square (52900 = 230²).

The spelling of 51917983 in words is "fifty-one million, nine hundred seventeen thousand, nine hundred eighty-three".