51743940 has 24 divisors (see below), whose sum is σ = 144883200. Its totient is φ = 13798368.

The previous prime is 51743911. The next prime is 51743947. The reversal of 51743940 is 4934715.

It is not an unprimeable number, because it can be changed into a prime (51743947) by changing a digit.

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, 431140 + ... + 431259.

It is an arithmetic number, because the mean of its divisors is an integer number (6036800).

Almost surely, 2^51743940 is an apocalyptic number.

It is an amenable number.

51743940 is an abundant number, since it is smaller than the sum of its proper divisors (93139260).

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

51743940 is a wasteful number, since it uses less digits than its factorization.

51743940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862411 (or 862409 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 51743940 is about 7193.3260735212. The cubic root of 51743940 is about 372.6374490886.

The spelling of 51743940 in words is "fifty-one million, seven hundred forty-three thousand, nine hundred forty".