106590221 has 4 divisors (see below), whose sum is σ = 112860252. Its totient is φ = 100320192.

The previous prime is 106590157. The next prime is 106590251. The reversal of 106590221 is 122095601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122095601 = 761 ⋅160441.

It can be written as a sum of positive squares in 2 ways, for example, as 43705321 + 62884900 = 6611^2 + 7930^2 .

It is a cyclic number.

It is not a de Polignac number, because 106590221 - 2⁶ = 106590157 is a prime.

It is a super-2 number, since 2×106590221² = 22722950425657682, 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 (106590251) 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, 3134990 + ... + 3135023.

It is an arithmetic number, because the mean of its divisors is an integer number (28215063).

Almost surely, 2^106590221 is an apocalyptic number.

It is an amenable number.

106590221 is a deficient number, since it is larger than the sum of its proper divisors (6270031).

106590221 is an equidigital number, since it uses as much as digits as its factorization.

106590221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270030.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 106590221 is about 10324.2540166348. The cubic root of 106590221 is about 474.1391180725.

The spelling of 106590221 in words is "one hundred six million, five hundred ninety thousand, two hundred twenty-one".