83561171 has 6 divisors (see below), whose sum is σ = 88765980. Its totient is φ = 78645536.

The previous prime is 83561161. The next prime is 83561173. The reversal of 83561171 is 17116538.

It is a de Polignac number, because none of the positive numbers 2^k-83561171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83561173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144281 + ... + 144858.

It is an arithmetic number, because the mean of its divisors is an integer number (14794330).

Almost surely, 2^83561171 is an apocalyptic number.

83561171 is a deficient number, since it is larger than the sum of its proper divisors (5204809).

83561171 is a wasteful number, since it uses less digits than its factorization.

83561171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289173 (or 289156 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 83561171 is about 9141.1799566577. The cubic root of 83561171 is about 437.1879392071.

The spelling of 83561171 in words is "eighty-three million, five hundred sixty-one thousand, one hundred seventy-one".