51289018 has 16 divisors (see below), whose sum is σ = 88345440. Its totient is φ = 22086000.

The previous prime is 51289013. The next prime is 51289019. The reversal of 51289018 is 81098215.

It is not an unprimeable number, because it can be changed into a prime (51289013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60933 + ... + 61768.

It is an arithmetic number, because the mean of its divisors is an integer number (5521590).

Almost surely, 2^51289018 is an apocalyptic number.

51289018 is a deficient number, since it is larger than the sum of its proper divisors (37056422).

51289018 is a wasteful number, since it uses less digits than its factorization.

51289018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122733.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 51289018 is about 7161.6351484839. The cubic root of 51289018 is about 371.5421825884.

The spelling of 51289018 in words is "fifty-one million, two hundred eighty-nine thousand, eighteen".