51155546 has 8 divisors (see below), whose sum is σ = 82635924. Its totient is φ = 23610240.

The previous prime is 51155539. The next prime is 51155551. The reversal of 51155546 is 64555115.

It can be written as a sum of positive squares in 2 ways, for example, as 40819321 + 10336225 = 6389^2 + 3215^2 .

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

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 983735 + ... + 983786.

Almost surely, 2^51155546 is an apocalyptic number.

51155546 is a deficient number, since it is larger than the sum of its proper divisors (31480378).

51155546 is a wasteful number, since it uses less digits than its factorization.

51155546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967536.

The product of its digits is 15000, while the sum is 32.

The square root of 51155546 is about 7152.3105357639. The cubic root of 51155546 is about 371.2196082850.

The spelling of 51155546 in words is "fifty-one million, one hundred fifty-five thousand, five hundred forty-six".