51255545 has 32 divisors (see below), whose sum is σ = 69932160. Its totient is φ = 35735040.

The previous prime is 51255517. The next prime is 51255551. The reversal of 51255545 is 54555215.

51255545 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 51255545 - 2¹⁰ = 51254521 is a prime.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 180974 + ... + 181256.

It is an arithmetic number, because the mean of its divisors is an integer number (2185380).

Almost surely, 2^51255545 is an apocalyptic number.

51255545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51255545 is a deficient number, since it is larger than the sum of its proper divisors (18676615).

51255545 is a wasteful number, since it uses less digits than its factorization.

51255545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its digits is 25000, while the sum is 32.

The square root of 51255545 is about 7159.2978007623. The cubic root of 51255545 is about 371.4613378744.

The spelling of 51255545 in words is "fifty-one million, two hundred fifty-five thousand, five hundred forty-five".