105173561 has 2 divisors, whose sum is σ = 105173562. Its totient is φ = 105173560.

The previous prime is 105173539. The next prime is 105173567. The reversal of 105173561 is 165371501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54479161 + 50694400 = 7381^2 + 7120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105173561 is a prime.

It is a super-2 number, since 2×105173561² = 22122955866841442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105173567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52586780 + 52586781.

It is an arithmetic number, because the mean of its divisors is an integer number (52586781).

Almost surely, 2^105173561 is an apocalyptic number.

It is an amenable number.

105173561 is a deficient number, since it is larger than the sum of its proper divisors (1).

105173561 is an equidigital number, since it uses as much as digits as its factorization.

105173561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 105173561 is about 10255.4161787808. The cubic root of 105173561 is about 472.0291938876.

The spelling of 105173561 in words is "one hundred five million, one hundred seventy-three thousand, five hundred sixty-one".