51555764 has 24 divisors (see below), whose sum is σ = 102880008. Its totient is φ = 22394880.

The previous prime is 51555761. The next prime is 51555767. The reversal of 51555764 is 46755515.

51555764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51555761) and next prime (51555767).

It can be written as a sum of positive squares in 4 ways, for example, as 3364 + 51552400 = 58^2 + 7180^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555761) 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, 28277 + ... + 30044.

It is an arithmetic number, because the mean of its divisors is an integer number (4286667).

Almost surely, 2^51555764 is an apocalyptic number.

It is an amenable number.

51555764 is a deficient number, since it is larger than the sum of its proper divisors (51324244).

51555764 is a wasteful number, since it uses less digits than its factorization.

51555764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58355 (or 58353 counting only the distinct ones).

The product of its digits is 105000, while the sum is 38.

The square root of 51555764 is about 7180.2342580169. The cubic root of 51555764 is about 372.1851797036.

The spelling of 51555764 in words is "fifty-one million, five hundred fifty-five thousand, seven hundred sixty-four".