105722209 has 4 divisors (see below), whose sum is σ = 108579604. Its totient is φ = 102864816.

The previous prime is 105722207. The next prime is 105722219. The reversal of 105722209 is 902227501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902227501 = 7 ⋅128889643.

It can be written as a sum of positive squares in 2 ways, for example, as 85155984 + 20566225 = 9228^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 105722209 - 2¹ = 105722207 is a prime.

It is a super-2 number, since 2×105722209² = 22354370951679362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105722207) 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, 1428642 + ... + 1428715.

It is an arithmetic number, because the mean of its divisors is an integer number (27144901).

Almost surely, 2^105722209 is an apocalyptic number.

It is an amenable number.

105722209 is a deficient number, since it is larger than the sum of its proper divisors (2857395).

105722209 is an equidigital number, since it uses as much as digits as its factorization.

105722209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857394.

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

The square root of 105722209 is about 10282.1305671539. The cubic root of 105722209 is about 472.8485659922.

The spelling of 105722209 in words is "one hundred five million, seven hundred twenty-two thousand, two hundred nine".