51655603 has 8 divisors (see below), whose sum is σ = 52506848. Its totient is φ = 50808384.

The previous prime is 51655573. The next prime is 51655609. The reversal of 51655603 is 30655615.

51655603 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51655603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51655609) 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, 34825 + ... + 36277.

It is an arithmetic number, because the mean of its divisors is an integer number (6563356).

Almost surely, 2^51655603 is an apocalyptic number.

51655603 is a deficient number, since it is larger than the sum of its proper divisors (851245).

51655603 is a wasteful number, since it uses less digits than its factorization.

51655603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 51655603 is about 7187.1832451942. The cubic root of 51655603 is about 372.4252733606.

It can be divided in two parts, 51 and 655603, that multiplied together give a triangular number (33435753 = T₈₁₇₇).

The spelling of 51655603 in words is "fifty-one million, six hundred fifty-five thousand, six hundred three".