22505430 has 32 divisors (see below), whose sum is σ = 54626400. Its totient is φ = 5933312.

The previous prime is 22505429. The next prime is 22505447. The reversal of 22505430 is 3450522.

It is a junction number, because it is equal to n+sod(n) for n = 22505397 and 22505406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1545 + ... + 6884.

It is an arithmetic number, because the mean of its divisors is an integer number (1707075).

Almost surely, 2^22505430 is an apocalyptic number.

22505430 is an abundant number, since it is smaller than the sum of its proper divisors (32120970).

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

22505430 is a wasteful number, since it uses less digits than its factorization.

22505430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 22505430 is about 4743.9888279801. The cubic root of 22505430 is about 282.3335171738. Note that the first 3 decimals are identical.

Adding to 22505430 its reverse (3450522), we get a palindrome (25955952).

The spelling of 22505430 in words is "twenty-two million, five hundred five thousand, four hundred thirty".