51138266 has 16 divisors (see below), whose sum is σ = 78702624. Its totient is φ = 24907344.

The previous prime is 51138229. The next prime is 51138271. The reversal of 51138266 is 66283115.

It is a happy number.

51138266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 49976 + ... + 50988.

It is an arithmetic number, because the mean of its divisors is an integer number (4918914).

Almost surely, 2^51138266 is an apocalyptic number.

51138266 is a deficient number, since it is larger than the sum of its proper divisors (27564358).

51138266 is a wasteful number, since it uses less digits than its factorization.

51138266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645.

The product of its digits is 8640, while the sum is 32.

The square root of 51138266 is about 7151.1024324925. The cubic root of 51138266 is about 371.1778050806.

The spelling of 51138266 in words is "fifty-one million, one hundred thirty-eight thousand, two hundred sixty-six".