19224855 has 48 divisors (see below), whose sum is σ = 36560160. Its totient is φ = 9287424.

The previous prime is 19224851. The next prime is 19224889. The reversal of 19224855 is 55842291.

It is not a de Polignac number, because 19224855 - 2² = 19224851 is a prime.

Its product of digits (28800) is a multiple of the sum of its prime factors (640).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19224851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34237 + ... + 34793.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^19224855 is an apocalyptic number.

19224855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19224855 is a deficient number, since it is larger than the sum of its proper divisors (17335305).

19224855 is a wasteful number, since it uses less digits than its factorization.

19224855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 637 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 19224855 is about 4384.6157186235. The cubic root of 19224855 is about 267.8886771255. Note that the first 3 decimals are identical.

The spelling of 19224855 in words is "nineteen million, two hundred twenty-four thousand, eight hundred fifty-five".