51581755 has 16 divisors (see below), whose sum is σ = 64882944. Its totient is φ = 39292000.

The previous prime is 51581729. The next prime is 51581767. The reversal of 51581755 is 55718515.

51581755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51581755 - 2⁷ = 51581627 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27972 + ... + 29758.

It is an arithmetic number, because the mean of its divisors is an integer number (4055184).

Almost surely, 2^51581755 is an apocalyptic number.

51581755 is a deficient number, since it is larger than the sum of its proper divisors (13301189).

51581755 is a wasteful number, since it uses less digits than its factorization.

51581755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066.

The product of its digits is 35000, while the sum is 37.

The square root of 51581755 is about 7182.0439291333. The cubic root of 51581755 is about 372.2477128983.

The spelling of 51581755 in words is "fifty-one million, five hundred eighty-one thousand, seven hundred fifty-five".