22505284 has 24 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 10898784.

The previous prime is 22505251. The next prime is 22505317. The reversal of 22505284 is 48250522.

It is an interprime number because it is at equal distance from previous prime (22505251) and next prime (22505317).

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 7 ways as a sum of consecutive naturals, for example, 16957 + ... + 18235.

It is an arithmetic number, because the mean of its divisors is an integer number (1693440).

Almost surely, 2^22505284 is an apocalyptic number.

It is an amenable number.

22505284 is a deficient number, since it is larger than the sum of its proper divisors (18137276).

22505284 is a wasteful number, since it uses less digits than its factorization.

22505284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419 (or 1417 counting only the distinct ones).

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

The square root of 22505284 is about 4743.9734400606. The cubic root of 22505284 is about 282.3329066429.

The spelling of 22505284 in words is "twenty-two million, five hundred five thousand, two hundred eighty-four".