22715121 has 24 divisors (see below), whose sum is σ = 35786016. Its totient is φ = 12704640.

The previous prime is 22715113. The next prime is 22715123. The reversal of 22715121 is 12151722.

It is not a de Polignac number, because 22715121 - 2³ = 22715113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22715123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3541 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (1491084).

Almost surely, 2^22715121 is an apocalyptic number.

It is an amenable number.

22715121 is a deficient number, since it is larger than the sum of its proper divisors (13070895).

22715121 is a wasteful number, since it uses less digits than its factorization.

22715121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113 (or 4100 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 22715121 is about 4766.0382919150. The cubic root of 22715121 is about 283.2076746899.

Adding to 22715121 its reverse (12151722), we get a palindrome (34866843).

The spelling of 22715121 in words is "twenty-two million, seven hundred fifteen thousand, one hundred twenty-one".