51455757 has 16 divisors (see below), whose sum is σ = 70031232. Its totient is φ = 33597120.

The previous prime is 51455749. The next prime is 51455771. The reversal of 51455757 is 75755415.

It is not a de Polignac number, because 51455757 - 2³ = 51455749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51455707) 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 15 ways as a sum of consecutive naturals, for example, 57568 + ... + 58454.

It is an arithmetic number, because the mean of its divisors is an integer number (4376952).

Almost surely, 2^51455757 is an apocalyptic number.

It is an amenable number.

51455757 is a deficient number, since it is larger than the sum of its proper divisors (18575475).

51455757 is a wasteful number, since it uses less digits than its factorization.

51455757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

The product of its digits is 122500, while the sum is 39.

The square root of 51455757 is about 7173.2668289978. The cubic root of 51455757 is about 371.9443710897.

The spelling of 51455757 in words is "fifty-one million, four hundred fifty-five thousand, seven hundred fifty-seven".