51145238 has 8 divisors (see below), whose sum is σ = 80053488. Its totient is φ = 24460744.

The previous prime is 51145229. The next prime is 51145249. The reversal of 51145238 is 83254115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51145238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555881 + ... + 555972.

It is an arithmetic number, because the mean of its divisors is an integer number (10006686).

Almost surely, 2^51145238 is an apocalyptic number.

51145238 is a deficient number, since it is larger than the sum of its proper divisors (28908250).

51145238 is a wasteful number, since it uses less digits than its factorization.

51145238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111878.

The product of its digits is 4800, while the sum is 29.

The square root of 51145238 is about 7151.5898931636. The cubic root of 51145238 is about 371.1946726454.

The spelling of 51145238 in words is "fifty-one million, one hundred forty-five thousand, two hundred thirty-eight".