51743487 has 4 divisors (see below), whose sum is σ = 68991320. Its totient is φ = 34495656.

The previous prime is 51743477. The next prime is 51743509. The reversal of 51743487 is 78434715.

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

It is not a de Polignac number, because 51743487 - 2⁸ = 51743231 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 (51743407) 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, 8623912 + ... + 8623917.

It is an arithmetic number, because the mean of its divisors is an integer number (17247830).

Almost surely, 2^51743487 is an apocalyptic number.

51743487 is a deficient number, since it is larger than the sum of its proper divisors (17247833).

51743487 is a wasteful number, since it uses less digits than its factorization.

51743487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17247832.

The product of its digits is 94080, while the sum is 39.

The square root of 51743487 is about 7193.2945859321. The cubic root of 51743487 is about 372.6363616488.

The spelling of 51743487 in words is "fifty-one million, seven hundred forty-three thousand, four hundred eighty-seven".