22520154 has 8 divisors (see below), whose sum is σ = 45040320. Its totient is φ = 7506716.

The previous prime is 22520143. The next prime is 22520203. The reversal of 22520154 is 45102522.

It is a happy number.

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

22520154 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 22520154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1876674 + ... + 1876685.

It is an arithmetic number, because the mean of its divisors is an integer number (5630040).

Almost surely, 2^22520154 is an apocalyptic number.

22520154 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22520154 is a wasteful number, since it uses less digits than its factorization.

22520154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753364.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 22520154 is about 4745.5404328696. The cubic root of 22520154 is about 282.3950752431.

Adding to 22520154 its reverse (45102522), we get a palindrome (67622676).

The spelling of 22520154 in words is "twenty-two million, five hundred twenty thousand, one hundred fifty-four".