22953985 has 4 divisors (see below), whose sum is σ = 27544788. Its totient is φ = 18363184.

The previous prime is 22953979. The next prime is 22953989. The reversal of 22953985 is 58935922.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58935922 = 2 ⋅29467961.

It can be written as a sum of positive squares in 2 ways, for example, as 15046641 + 7907344 = 3879^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 22953985 - 2¹⁹ = 22429697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22953989) 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, 2295394 + ... + 2295403.

It is an arithmetic number, because the mean of its divisors is an integer number (6886197).

It is a Proth number, since it is equal to 1401 ⋅ 2¹⁴ + 1 and 1401 < 2¹⁴.

Almost surely, 2^22953985 is an apocalyptic number.

It is an amenable number.

22953985 is a deficient number, since it is larger than the sum of its proper divisors (4590803).

22953985 is an equidigital number, since it uses as much as digits as its factorization.

22953985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4590802.

The product of its digits is 194400, while the sum is 43.

The square root of 22953985 is about 4791.0317260482. The cubic root of 22953985 is about 284.1969184127.

The spelling of 22953985 in words is "twenty-two million, nine hundred fifty-three thousand, nine hundred eighty-five".