51144559 has 4 divisors (see below), whose sum is σ = 51161904. Its totient is φ = 51127216.

The previous prime is 51144539. The next prime is 51144581. The reversal of 51144559 is 95544115.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95544115 = 5 ⋅19108823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51144559 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 (51144539) 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, 3022 + ... + 10555.

It is an arithmetic number, because the mean of its divisors is an integer number (12790476).

Almost surely, 2^51144559 is an apocalyptic number.

51144559 is a deficient number, since it is larger than the sum of its proper divisors (17345).

51144559 is a wasteful number, since it uses less digits than its factorization.

51144559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17344.

The product of its digits is 18000, while the sum is 34.

The square root of 51144559 is about 7151.5424210446. The cubic root of 51144559 is about 371.1930299881.

The spelling of 51144559 in words is "fifty-one million, one hundred forty-four thousand, five hundred fifty-nine".