51240103 has 2 divisors, whose sum is σ = 51240104. Its totient is φ = 51240102.

The previous prime is 51240097. The next prime is 51240121. The reversal of 51240103 is 30104215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51240103 - 2²⁵ = 17685671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51247103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25620051 + 25620052.

It is an arithmetic number, because the mean of its divisors is an integer number (25620052).

Almost surely, 2^51240103 is an apocalyptic number.

51240103 is a deficient number, since it is larger than the sum of its proper divisors (1).

51240103 is an equidigital number, since it uses as much as digits as its factorization.

51240103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51240103 is about 7158.2192617997. The cubic root of 51240103 is about 371.4240301572.

Adding to 51240103 its reverse (30104215), we get a palindrome (81344318).

The spelling of 51240103 in words is "fifty-one million, two hundred forty thousand, one hundred three".