51743920 has 40 divisors (see below), whose sum is σ = 127384704. Its totient is φ = 19479552.

The previous prime is 51743911. The next prime is 51743947. The reversal of 51743920 is 2934715.

It is a tau number, because it is divible by the number of its divisors (40).

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, 17664 + ... + 20383.

Almost surely, 2^51743920 is an apocalyptic number.

It is an amenable number.

51743920 is an abundant number, since it is smaller than the sum of its proper divisors (75640784).

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

51743920 is a wasteful number, since it uses less digits than its factorization.

51743920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38077 (or 38071 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 51743920 is about 7193.3246833436. The cubic root of 51743920 is about 372.6374010782.

The spelling of 51743920 in words is "fifty-one million, seven hundred forty-three thousand, nine hundred twenty".