22315705 has 4 divisors (see below), whose sum is σ = 26778852. Its totient is φ = 17852560.

The previous prime is 22315697. The next prime is 22315721. The reversal of 22315705 is 50751322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50751322 = 2 ⋅25375661.

It can be written as a sum of positive squares in 2 ways, for example, as 13571856 + 8743849 = 3684^2 + 2957^2 .

It is not a de Polignac number, because 22315705 - 2³ = 22315697 is a prime.

It is a super-3 number, since 3×22315705³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22315705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231566 + ... + 2231575.

It is an arithmetic number, because the mean of its divisors is an integer number (6694713).

Almost surely, 2^22315705 is an apocalyptic number.

It is an amenable number.

22315705 is a deficient number, since it is larger than the sum of its proper divisors (4463147).

22315705 is an equidigital number, since it uses as much as digits as its factorization.

22315705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4463146.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 22315705 is about 4723.9501479165. The cubic root of 22315705 is about 281.5379023890.

The spelling of 22315705 in words is "twenty-two million, three hundred fifteen thousand, seven hundred five".