22313309 has 4 divisors (see below), whose sum is σ = 22429116. Its totient is φ = 22197504.

The previous prime is 22313303. The next prime is 22313321. The reversal of 22313309 is 90331322.

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 14417209 + 7896100 = 3797^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 22313309 - 2¹² = 22309213 is a prime.

It is a super-3 number, since 3×22313309³ (a number of 23 digits) contains 333 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 (22313303) 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, 57614 + ... + 57999.

It is an arithmetic number, because the mean of its divisors is an integer number (5607279).

Almost surely, 2^22313309 is an apocalyptic number.

It is an amenable number.

22313309 is a deficient number, since it is larger than the sum of its proper divisors (115807).

22313309 is a wasteful number, since it uses less digits than its factorization.

22313309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115806.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 22313309 is about 4723.6965397875. The cubic root of 22313309 is about 281.5278259434.

It can be divided in two parts, 22313 and 309, that added together give a palindrome (22622).

The spelling of 22313309 in words is "twenty-two million, three hundred thirteen thousand, three hundred nine".