22145450 has 24 divisors (see below), whose sum is σ = 43360320. Its totient is φ = 8391600.

The previous prime is 22145449. The next prime is 22145471. The reversal of 22145450 is 5454122.

It is a happy number.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 10706 + ... + 12605.

It is an arithmetic number, because the mean of its divisors is an integer number (1806680).

Almost surely, 2^22145450 is an apocalyptic number.

22145450 is a deficient number, since it is larger than the sum of its proper divisors (21214870).

22145450 is a wasteful number, since it uses less digits than its factorization.

22145450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23342 (or 23337 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 22145450 is about 4705.8952389529. The cubic root of 22145450 is about 280.8200872122.

Adding to 22145450 its reverse (5454122), we get a palindrome (27599572).

The spelling of 22145450 in words is "twenty-two million, one hundred forty-five thousand, four hundred fifty".