51261755 has 8 divisors (see below), whose sum is σ = 63498624. Its totient is φ = 39686400.

The previous prime is 51261751. The next prime is 51261773. The reversal of 51261755 is 55716215.

51261755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51261755 - 2² = 51261751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51261751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165206 + ... + 165515.

It is an arithmetic number, because the mean of its divisors is an integer number (7937328).

Almost surely, 2^51261755 is an apocalyptic number.

51261755 is a deficient number, since it is larger than the sum of its proper divisors (12236869).

51261755 is a wasteful number, since it uses less digits than its factorization.

51261755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330757.

The product of its digits is 10500, while the sum is 32.

The square root of 51261755 is about 7159.7314893786. The cubic root of 51261755 is about 371.4763390594.

The spelling of 51261755 in words is "fifty-one million, two hundred sixty-one thousand, seven hundred fifty-five".