51384743 has 4 divisors (see below), whose sum is σ = 51883728. Its totient is φ = 50885760.

The previous prime is 51384733. The next prime is 51384757. The reversal of 51384743 is 34748315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51384743 - 2⁶ = 51384679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51384703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249338 + ... + 249543.

It is an arithmetic number, because the mean of its divisors is an integer number (12970932).

Almost surely, 2^51384743 is an apocalyptic number.

51384743 is a deficient number, since it is larger than the sum of its proper divisors (498985).

51384743 is a wasteful number, since it uses less digits than its factorization.

51384743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498984.

The product of its digits is 40320, while the sum is 35.

The square root of 51384743 is about 7168.3152134933. The cubic root of 51384743 is about 371.7731857232.

The spelling of 51384743 in words is "fifty-one million, three hundred eighty-four thousand, seven hundred forty-three".