106171591 has 4 divisors (see below), whose sum is σ = 108761184. Its totient is φ = 103582000.

The previous prime is 106171577. The next prime is 106171603. The reversal of 106171591 is 195171601.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106171591 is a prime.

It is a super-2 number, since 2×106171591² = 22544813470942562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106174591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1294735 + ... + 1294816.

It is an arithmetic number, because the mean of its divisors is an integer number (27190296).

Almost surely, 2^106171591 is an apocalyptic number.

106171591 is a deficient number, since it is larger than the sum of its proper divisors (2589593).

106171591 is an equidigital number, since it uses as much as digits as its factorization.

106171591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589592.

The product of its (nonzero) digits is 1890, while the sum is 31.

The square root of 106171591 is about 10303.9599669253. The cubic root of 106171591 is about 473.5175811288.

The spelling of 106171591 in words is "one hundred six million, one hundred seventy-one thousand, five hundred ninety-one".