51086144 has 14 divisors (see below), whose sum is σ = 101374194. Its totient is φ = 25543040.

The previous prime is 51086143. The next prime is 51086179. The reversal of 51086144 is 44168015.

It can be written as a sum of positive squares in only one way, i.e., 50239744 + 846400 = 7088^2 + 920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399047 + ... + 399174.

Almost surely, 2^51086144 is an apocalyptic number.

It is an amenable number.

51086144 is a deficient number, since it is larger than the sum of its proper divisors (50288050).

51086144 is an equidigital number, since it uses as much as digits as its factorization.

51086144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798233 (or 798223 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 51086144 is about 7147.4571702110. The cubic root of 51086144 is about 371.0516561925.

The spelling of 51086144 in words is "fifty-one million, eighty-six thousand, one hundred forty-four".