106506217 has 4 divisors (see below), whose sum is σ = 107560836. Its totient is φ = 105451600.

The previous prime is 106506199. The next prime is 106506221. The reversal of 106506217 is 712605601.

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 70157376 + 36348841 = 8376^2 + 6029^2 .

It is a cyclic number.

It is not a de Polignac number, because 106506217 - 2¹¹ = 106504169 is a prime.

It is a super-2 number, since 2×106506217² = 22687148519302178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106501217) 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, 527158 + ... + 527359.

It is an arithmetic number, because the mean of its divisors is an integer number (26890209).

Almost surely, 2^106506217 is an apocalyptic number.

It is an amenable number.

106506217 is a deficient number, since it is larger than the sum of its proper divisors (1054619).

106506217 is a wasteful number, since it uses less digits than its factorization.

106506217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054618.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 106506217 is about 10320.1849305136. The cubic root of 106506217 is about 474.0145286247.

The spelling of 106506217 in words is "one hundred six million, five hundred six thousand, two hundred seventeen".