51143155 has 16 divisors (see below), whose sum is σ = 73831680. Its totient is φ = 33223392.

The previous prime is 51143137. The next prime is 51143159. The reversal of 51143155 is 55134115.

It is a happy number.

51143155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51143155 - 2¹¹ = 51141107 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (51143159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37789 + ... + 39118.

It is an arithmetic number, because the mean of its divisors is an integer number (4614480).

Almost surely, 2^51143155 is an apocalyptic number.

51143155 is a deficient number, since it is larger than the sum of its proper divisors (22688525).

51143155 is a wasteful number, since it uses less digits than its factorization.

51143155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76938.

The product of its digits is 1500, while the sum is 25.

The square root of 51143155 is about 7151.4442597282. Note that the first 3 decimals coincide. The cubic root of 51143155 is about 371.1896333428.

The spelling of 51143155 in words is "fifty-one million, one hundred forty-three thousand, one hundred fifty-five".