51055506 has 24 divisors (see below), whose sum is σ = 110859840. Its totient is φ = 16981656.

The previous prime is 51055493. The next prime is 51055507. The reversal of 51055506 is 60555015.

51055506 is a `hidden beast` number, since 5 + 105 + 550 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51055506.

It is not an unprimeable number, because it can be changed into a prime (51055507) 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 11 ways as a sum of consecutive naturals, for example, 6235 + ... + 11873.

It is an arithmetic number, because the mean of its divisors is an integer number (4619160).

Almost surely, 2^51055506 is an apocalyptic number.

51055506 is an abundant number, since it is smaller than the sum of its proper divisors (59804334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51055506 is a wasteful number, since it uses less digits than its factorization.

51055506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6150 (or 6147 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 51055506 is about 7145.3135690465. The cubic root of 51055506 is about 370.9774641634.

The spelling of 51055506 in words is "fifty-one million, fifty-five thousand, five hundred six".