103135561 has 2 divisors, whose sum is σ = 103135562. Its totient is φ = 103135560.

The previous prime is 103135547. The next prime is 103135573. The reversal of 103135561 is 165531301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57153600 + 45981961 = 7560^2 + 6781^2 .

It is a cyclic number.

It is not a de Polignac number, because 103135561 - 2¹⁵ = 103102793 is a prime.

It is not a weakly prime, because it can be changed into another prime (103135661) 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 as a sum of consecutive naturals, namely, 51567780 + 51567781.

It is an arithmetic number, because the mean of its divisors is an integer number (51567781).

Almost surely, 2^103135561 is an apocalyptic number.

It is an amenable number.

103135561 is a deficient number, since it is larger than the sum of its proper divisors (1).

103135561 is an equidigital number, since it uses as much as digits as its factorization.

103135561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 103135561 is about 10155.5679801772. The cubic root of 103135561 is about 468.9603714454.

Adding to 103135561 its reverse (165531301), we get a palindrome (268666862).

The spelling of 103135561 in words is "one hundred three million, one hundred thirty-five thousand, five hundred sixty-one".