51465556 has 6 divisors (see below), whose sum is σ = 90064730. Its totient is φ = 25732776.

The previous prime is 51465551. The next prime is 51465563. The reversal of 51465556 is 65556415.

It can be written as a sum of positive squares in only one way, i.e., 50637456 + 828100 = 7116^2 + 910^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51465551) 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 as a sum of consecutive naturals, namely, 6433191 + ... + 6433198.

Almost surely, 2^51465556 is an apocalyptic number.

It is an amenable number.

51465556 is a deficient number, since it is larger than the sum of its proper divisors (38599174).

51465556 is a wasteful number, since it uses less digits than its factorization.

51465556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12866393 (or 12866391 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The square root of 51465556 is about 7173.9498186146. The cubic root of 51465556 is about 371.9679800551.

The spelling of 51465556 in words is "fifty-one million, four hundred sixty-five thousand, five hundred fifty-six".