51738559 has 4 divisors (see below), whose sum is σ = 51879904. Its totient is φ = 51597216.

The previous prime is 51738551. The next prime is 51738571. The reversal of 51738559 is 95583715.

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 51738559 - 2³ = 51738551 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 (51738551) 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, 70122 + ... + 70855.

It is an arithmetic number, because the mean of its divisors is an integer number (12969976).

Almost surely, 2^51738559 is an apocalyptic number.

51738559 is a deficient number, since it is larger than the sum of its proper divisors (141345).

51738559 is a wasteful number, since it uses less digits than its factorization.

51738559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141344.

The product of its digits is 189000, while the sum is 43.

The square root of 51738559 is about 7192.9520365424. The cubic root of 51738559 is about 372.6245314302.

The spelling of 51738559 in words is "fifty-one million, seven hundred thirty-eight thousand, five hundred fifty-nine".