51081738 has 32 divisors (see below), whose sum is σ = 107059200. Its totient is φ = 16228080.

The previous prime is 51081733. The next prime is 51081739. The reversal of 51081738 is 83718015.

It is a junction number, because it is equal to n+sod(n) for n = 51081699 and 51081708.

It is not an unprimeable number, because it can be changed into a prime (51081733) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10413 + ... + 14511.

It is an arithmetic number, because the mean of its divisors is an integer number (3345600).

Almost surely, 2^51081738 is an apocalyptic number.

51081738 is an abundant number, since it is smaller than the sum of its proper divisors (55977462).

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

51081738 is a wasteful number, since it uses less digits than its factorization.

51081738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 51081738 is about 7147.1489420607. The cubic root of 51081738 is about 371.0409885863.

The spelling of 51081738 in words is "fifty-one million, eighty-one thousand, seven hundred thirty-eight".