51226986 has 16 divisors (see below), whose sum is σ = 104191200. Its totient is φ = 16786128.

The previous prime is 51226939. The next prime is 51227009. The reversal of 51226986 is 68962215.

51226986 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, 72001 + ... + 72708.

It is an arithmetic number, because the mean of its divisors is an integer number (6511950).

Almost surely, 2^51226986 is an apocalyptic number.

51226986 is an abundant number, since it is smaller than the sum of its proper divisors (52964214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51226986 is a wasteful number, since it uses less digits than its factorization.

51226986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144773.

The product of its digits is 51840, while the sum is 39.

The square root of 51226986 is about 7157.3029836664. The cubic root of 51226986 is about 371.3923337287.

The spelling of 51226986 in words is "fifty-one million, two hundred twenty-six thousand, nine hundred eighty-six".