103306561 has 2 divisors, whose sum is σ = 103306562. Its totient is φ = 103306560.

The previous prime is 103306549. The next prime is 103306571. The reversal of 103306561 is 165603301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67963536 + 35343025 = 8244^2 + 5945^2 .

It is a cyclic number.

It is not a de Polignac number, because 103306561 - 2¹³ = 103298369 is a prime.

It is not a weakly prime, because it can be changed into another prime (103306571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51653280 + 51653281.

It is an arithmetic number, because the mean of its divisors is an integer number (51653281).

Almost surely, 2^103306561 is an apocalyptic number.

It is an amenable number.

103306561 is a deficient number, since it is larger than the sum of its proper divisors (1).

103306561 is an equidigital number, since it uses as much as digits as its factorization.

103306561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 103306561 is about 10163.9835202543. The cubic root of 103306561 is about 469.2194089801.

Adding to 103306561 its reverse (165603301), we get a palindrome (268909862).

The spelling of 103306561 in words is "one hundred three million, three hundred six thousand, five hundred sixty-one".