19222272 has 126 divisors (see below), whose sum is σ = 58086392. Its totient is φ = 6345216.

The previous prime is 19222261. The next prime is 19222279. The reversal of 19222272 is 27222291.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19222279) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 186573 + ... + 186675.

Almost surely, 2^19222272 is an apocalyptic number.

19222272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19222272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29043196).

19222272 is an abundant number, since it is smaller than the sum of its proper divisors (38864120).

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

19222272 is an frugal number, since it uses more digits than its factorization.

19222272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 108 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 19222272 is about 4384.3211561198. The cubic root of 19222272 is about 267.8766789865.

The spelling of 19222272 in words is "nineteen million, two hundred twenty-two thousand, two hundred seventy-two".