51806452 has 12 divisors (see below), whose sum is σ = 92872836. Its totient is φ = 25271360.

The previous prime is 51806449. The next prime is 51806467. The reversal of 51806452 is 25460815.

It can be written as a sum of positive squares in 2 ways, for example, as 30958096 + 20848356 = 5564^2 + 4566^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 157783 + ... + 158110.

It is an arithmetic number, because the mean of its divisors is an integer number (7739403).

Almost surely, 2^51806452 is an apocalyptic number.

It is an amenable number.

51806452 is a deficient number, since it is larger than the sum of its proper divisors (41066384).

51806452 is a wasteful number, since it uses less digits than its factorization.

51806452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315938 (or 315936 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 51806452 is about 7197.6699007387. The cubic root of 51806452 is about 372.7874501507.

The spelling of 51806452 in words is "fifty-one million, eight hundred six thousand, four hundred fifty-two".