51585554 has 8 divisors (see below), whose sum is σ = 77680188. Its totient is φ = 25692160.

The previous prime is 51585539. The next prime is 51585559. The reversal of 51585554 is 45558515.

It can be written as a sum of positive squares in 2 ways, for example, as 50908225 + 677329 = 7135^2 + 823^2 .

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

It is a super-2 number, since 2×51585554² = 5322138762973832, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51585559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49667 + ... + 50694.

Almost surely, 2^51585554 is an apocalyptic number.

51585554 is a deficient number, since it is larger than the sum of its proper divisors (26094634).

51585554 is a wasteful number, since it uses less digits than its factorization.

51585554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100620.

The product of its digits is 100000, while the sum is 38.

The square root of 51585554 is about 7182.3084032921. The cubic root of 51585554 is about 372.2568513643.

The spelling of 51585554 in words is "fifty-one million, five hundred eighty-five thousand, five hundred fifty-four".