106171561 has 4 divisors (see below), whose sum is σ = 108174852. Its totient is φ = 104168272.

The previous prime is 106171547. The next prime is 106171577. The reversal of 106171561 is 165171601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92064025 + 14107536 = 9595^2 + 3756^2 .

It is a cyclic number.

It is not a de Polignac number, because 106171561 - 2⁵ = 106171529 is a prime.

It is a super-2 number, since 2×106171561² = 22544800730353442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106171661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001566 + ... + 1001671.

It is an arithmetic number, because the mean of its divisors is an integer number (27043713).

Almost surely, 2^106171561 is an apocalyptic number.

It is an amenable number.

106171561 is a deficient number, since it is larger than the sum of its proper divisors (2003291).

106171561 is an equidigital number, since it uses as much as digits as its factorization.

106171561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003290.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 106171561 is about 10303.9585111742. The cubic root of 106171561 is about 473.5175365296.

The spelling of 106171561 in words is "one hundred six million, one hundred seventy-one thousand, five hundred sixty-one".