51983140 has 24 divisors (see below), whose sum is σ = 119089152. Its totient is φ = 18902880.

The previous prime is 51983137. The next prime is 51983159. The reversal of 51983140 is 4138915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117924 + ... + 118363.

It is an arithmetic number, because the mean of its divisors is an integer number (4962048).

Almost surely, 2^51983140 is an apocalyptic number.

It is an amenable number.

51983140 is an abundant number, since it is smaller than the sum of its proper divisors (67106012).

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

51983140 is a wasteful number, since it uses less digits than its factorization.

51983140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236307 (or 236305 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 51983140 is about 7209.9334254901. The cubic root of 51983140 is about 373.2107714890.

It can be divided in two parts, 5198 and 3140, that added together give a palindrome (8338).

The spelling of 51983140 in words is "fifty-one million, nine hundred eighty-three thousand, one hundred forty".