22315145 has 8 divisors (see below), whose sum is σ = 26803656. Its totient is φ = 17835136.

The previous prime is 22315121. The next prime is 22315147. The reversal of 22315145 is 54151322.

It can be written as a sum of positive squares in 4 ways, for example, as 4227136 + 18088009 = 2056^2 + 4253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22315145 - 2⁸ = 22314889 is a prime.

It is a super-3 number, since 3×22315145³ (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 22315145.

It is not an unprimeable number, because it can be changed into a prime (22315147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8399 + ... + 10731.

It is an arithmetic number, because the mean of its divisors is an integer number (3350457).

Almost surely, 2^22315145 is an apocalyptic number.

It is an amenable number.

22315145 is a deficient number, since it is larger than the sum of its proper divisors (4488511).

22315145 is a wasteful number, since it uses less digits than its factorization.

22315145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251.

The product of its digits is 1200, while the sum is 23.

The square root of 22315145 is about 4723.8908751156. The cubic root of 22315145 is about 281.5355473578.

Adding to 22315145 its reverse (54151322), we get a palindrome (76466467).

The spelling of 22315145 in words is "twenty-two million, three hundred fifteen thousand, one hundred forty-five".