22515404401 has 24 divisors (see below), whose sum is σ = 28083179520. Its totient is φ = 17933715072.

The previous prime is 22515404389. The next prime is 22515404411. The reversal of 22515404401 is 10440451522.

It is not a de Polignac number, because 22515404401 - 2¹³ = 22515396209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22515404401.

It is not an unprimeable number, because it can be changed into a prime (22515404411) 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, 105265 + ... + 236878.

It is an arithmetic number, because the mean of its divisors is an integer number (1170132480).

Almost surely, 2^22515404401 is an apocalyptic number.

It is an amenable number.

22515404401 is a deficient number, since it is larger than the sum of its proper divisors (5567775119).

22515404401 is a wasteful number, since it uses less digits than its factorization.

22515404401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342253 (or 342246 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 22515404401 its reverse (10440451522), we get a palindrome (32955855923).

The spelling of 22515404401 in words is "twenty-two billion, five hundred fifteen million, four hundred four thousand, four hundred one".