22515122 has 16 divisors (see below), whose sum is σ = 38981952. Its totient is φ = 9553200.

The previous prime is 22515121. The next prime is 22515127. The reversal of 22515122 is 22151522.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22515094 and 22515103.

It is not an unprimeable number, because it can be changed into a prime (22515121) 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, 6548 + ... + 9375.

It is an arithmetic number, because the mean of its divisors is an integer number (2436372).

Almost surely, 2^22515122 is an apocalyptic number.

22515122 is a deficient number, since it is larger than the sum of its proper divisors (16466830).

22515122 is a wasteful number, since it uses less digits than its factorization.

22515122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16033.

The product of its digits is 400, while the sum is 20.

The square root of 22515122 is about 4745.0102212746. The cubic root of 22515122 is about 282.3740404865.

Adding to 22515122 its reverse (22151522), we get a palindrome (44666644).

The spelling of 22515122 in words is "twenty-two million, five hundred fifteen thousand, one hundred twenty-two".