51738145 has 4 divisors (see below), whose sum is σ = 62085780. Its totient is φ = 41390512.

The previous prime is 51738139. The next prime is 51738161. The reversal of 51738145 is 54183715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7661824 + 44076321 = 2768^2 + 6639^2 .

It is a cyclic number.

It is not a de Polignac number, because 51738145 - 2¹⁵ = 51705377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51738145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5173810 + ... + 5173819.

It is an arithmetic number, because the mean of its divisors is an integer number (15521445).

Almost surely, 2^51738145 is an apocalyptic number.

It is an amenable number.

51738145 is a deficient number, since it is larger than the sum of its proper divisors (10347635).

51738145 is a wasteful number, since it uses less digits than its factorization.

51738145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10347634.

The product of its digits is 16800, while the sum is 34.

The square root of 51738145 is about 7192.9232583144. The cubic root of 51738145 is about 372.6235375424.

The spelling of 51738145 in words is "fifty-one million, seven hundred thirty-eight thousand, one hundred forty-five".