51800543 has 4 divisors (see below), whose sum is σ = 51824160. Its totient is φ = 51776928.

The previous prime is 51800527. The next prime is 51800569. The reversal of 51800543 is 34500815.

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 51800543 - 2⁴ = 51800527 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 (51800503) 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, 8138 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (12956040).

Almost surely, 2^51800543 is an apocalyptic number.

51800543 is a deficient number, since it is larger than the sum of its proper divisors (23617).

51800543 is a wasteful number, since it uses less digits than its factorization.

51800543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23616.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 51800543 is about 7197.2594089695. The cubic root of 51800543 is about 372.7732763383.

The spelling of 51800543 in words is "fifty-one million, eight hundred thousand, five hundred forty-three".