51556466 has 16 divisors (see below), whose sum is σ = 85536024. Its totient is φ = 23151744.

The previous prime is 51556457. The next prime is 51556471. The reversal of 51556466 is 66465515.

It can be written as a sum of positive squares in 4 ways, for example, as 44422225 + 7134241 = 6665^2 + 2671^2 .

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 7 ways as a sum of consecutive naturals, for example, 25835 + ... + 27758.

Almost surely, 2^51556466 is an apocalyptic number.

51556466 is a deficient number, since it is larger than the sum of its proper divisors (33979558).

51556466 is a wasteful number, since it uses less digits than its factorization.

51556466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53645.

The product of its digits is 108000, while the sum is 38.

The square root of 51556466 is about 7180.2831420495. The cubic root of 51556466 is about 372.1868689606.

The spelling of 51556466 in words is "fifty-one million, five hundred fifty-six thousand, four hundred sixty-six".