51404543 has 4 divisors (see below), whose sum is σ = 51688728. Its totient is φ = 51120360.

The previous prime is 51404539. The next prime is 51404567. The reversal of 51404543 is 34540415.

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 51404543 - 2² = 51404539 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 (51404503) 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, 141821 + ... + 142182.

It is an arithmetic number, because the mean of its divisors is an integer number (12922182).

Almost surely, 2^51404543 is an apocalyptic number.

51404543 is a deficient number, since it is larger than the sum of its proper divisors (284185).

51404543 is a wasteful number, since it uses less digits than its factorization.

51404543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284184.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 51404543 is about 7169.6961581367. The cubic root of 51404543 is about 371.8209311782.

Adding to 51404543 its reverse (34540415), we get a palindrome (85944958).

The spelling of 51404543 in words is "fifty-one million, four hundred four thousand, five hundred forty-three".