24221145 has 32 divisors (see below), whose sum is σ = 41997312. Its totient is φ = 11849472.

The previous prime is 24221123. The next prime is 24221147. The reversal of 24221145 is 54112242.

It is not a de Polignac number, because 24221145 - 2⁶ = 24221081 is a prime.

It is a super-2 number, since 2×24221145² = 1173327730222050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (24221147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43207 + ... + 43763.

It is an arithmetic number, because the mean of its divisors is an integer number (1312416).

Almost surely, 2^24221145 is an apocalyptic number.

It is an amenable number.

24221145 is a deficient number, since it is larger than the sum of its proper divisors (17776167).

24221145 is a wasteful number, since it uses less digits than its factorization.

24221145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801.

The product of its digits is 640, while the sum is 21.

The square root of 24221145 is about 4921.4982474852. The cubic root of 24221145 is about 289.3331686038. Note that the first 3 decimals are identical.

Adding to 24221145 its reverse (54112242), we get a palindrome (78333387).

The spelling of 24221145 in words is "twenty-four million, two hundred twenty-one thousand, one hundred forty-five".