Search a number
51103 = 133931

51103 has 4 divisors (see below), whose sum is σ = 55048. Its totient is φ = 47160.

The previous prime is 51071. The next prime is 51109. The reversal of 51103 is 30115.

Adding to 51103 its reverse (30115), we get a palindrome (81218).

It can be divided in two parts, 51 and 103, that multiplied together give a triangular number (5253 = T102).

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51103 - 25 = 51071 is a prime.

It is a super-2 number, since 2×511032 = 5223033218, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 51103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51109) 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 3 ways as a sum of consecutive naturals, for example, 1953 + ... + 1978.

It is an arithmetic number, because the mean of its divisors is an integer number (13762).

251103 is an apocalyptic number.

51103 is a deficient number, since it is larger than the sum of its proper divisors (3945).

51103 is a wasteful number, since it uses less digits than its factorization.

51103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944.

The product of its (nonzero) digits is 15, while the sum is 10.

The square root of 51103 is about 226.0597266211. The cubic root of 51103 is about 37.1092461510.

The spelling of 51103 in words is "fifty-one thousand, one hundred three".

Divisors: 1 13 3931 51103