51015103 has 2 divisors, whose sum is σ = 51015104. Its totient is φ = 51015102.

The previous prime is 51015077. The next prime is 51015131. The reversal of 51015103 is 30151015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51015103 - 2⁹ = 51014591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51015143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25507551 + 25507552.

It is an arithmetic number, because the mean of its divisors is an integer number (25507552).

Almost surely, 2^51015103 is an apocalyptic number.

51015103 is a deficient number, since it is larger than the sum of its proper divisors (1).

51015103 is an equidigital number, since it uses as much as digits as its factorization.

51015103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 51015103 is about 7142.4857717744. The cubic root of 51015103 is about 370.8795801207.

Adding to 51015103 its reverse (30151015), we get a palindrome (81166118).

The spelling of 51015103 in words is "fifty-one million, fifteen thousand, one hundred three".