51023543 has 2 divisors, whose sum is σ = 51023544. Its totient is φ = 51023542.

The previous prime is 51023527. The next prime is 51023561. The reversal of 51023543 is 34532015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51023543 - 2⁴ = 51023527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51023573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25511771 + 25511772.

It is an arithmetic number, because the mean of its divisors is an integer number (25511772).

Almost surely, 2^51023543 is an apocalyptic number.

51023543 is a deficient number, since it is larger than the sum of its proper divisors (1).

51023543 is an equidigital number, since it uses as much as digits as its factorization.

51023543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 51023543 is about 7143.0765780579. The cubic root of 51023543 is about 370.9000319142.

Adding to 51023543 its reverse (34532015), we get a palindrome (85555558).

The spelling of 51023543 in words is "fifty-one million, twenty-three thousand, five hundred forty-three".