22521145 has 8 divisors (see below), whose sum is σ = 27054720. Its totient is φ = 17997360.

The previous prime is 22521133. The next prime is 22521193. The reversal of 22521145 is 54112522.

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

It is not a de Polignac number, because 22521145 - 2⁵ = 22521113 is a prime.

It is a super-2 number, since 2×22521145² = 1014403944222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4326 + ... + 7984.

It is an arithmetic number, because the mean of its divisors is an integer number (3381840).

Almost surely, 2^22521145 is an apocalyptic number.

It is an amenable number.

22521145 is a deficient number, since it is larger than the sum of its proper divisors (4533575).

22521145 is a wasteful number, since it uses less digits than its factorization.

22521145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895.

The product of its digits is 800, while the sum is 22.

The square root of 22521145 is about 4745.6448455400. The cubic root of 22521145 is about 282.3992174500.

Adding to 22521145 its reverse (54112522), we get a palindrome (76633667).

The spelling of 22521145 in words is "twenty-two million, five hundred twenty-one thousand, one hundred forty-five".