51665103 has 24 divisors (see below), whose sum is σ = 85869056. Its totient is φ = 29322000.

The previous prime is 51665101. The next prime is 51665111. The reversal of 51665103 is 30156615.

It is a happy number.

51665103 is a `hidden beast` number, since 5 + 1 + 6 + 651 + 0 + 3 = 666.

51665103 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 51665103 - 2¹ = 51665101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51665101) 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 23 ways as a sum of consecutive naturals, for example, 6798 + ... + 12228.

Almost surely, 2^51665103 is an apocalyptic number.

51665103 is a deficient number, since it is larger than the sum of its proper divisors (34203953).

51665103 is a wasteful number, since it uses less digits than its factorization.

51665103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595 (or 5592 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51665103 is about 7187.8441135016. The cubic root of 51665103 is about 372.4481029152.

The spelling of 51665103 in words is "fifty-one million, six hundred sixty-five thousand, one hundred three".