51566146 has 8 divisors (see below), whose sum is σ = 77571900. Its totient is φ = 25708848.

The previous prime is 51566111. The next prime is 51566149. The reversal of 51566146 is 64166515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51279921 + 286225 = 7161^2 + 535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51566149) 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 3 ways as a sum of consecutive naturals, for example, 36241 + ... + 37636.

Almost surely, 2^51566146 is an apocalyptic number.

51566146 is a deficient number, since it is larger than the sum of its proper divisors (26005754).

51566146 is a wasteful number, since it uses less digits than its factorization.

51566146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74228.

The product of its digits is 21600, while the sum is 34.

The square root of 51566146 is about 7180.9571785382. The cubic root of 51566146 is about 372.2101608560.

The spelling of 51566146 in words is "fifty-one million, five hundred sixty-six thousand, one hundred forty-six".