22145311224 has 112 divisors (see below), whose sum is σ = 65532126600. Its totient is φ = 6993221184.

The previous prime is 22145311219. The next prime is 22145311241. The reversal of 22145311224 is 42211354122.

22145311224 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 531 + 122 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10882 + ... + 210734.

Almost surely, 2^22145311224 is an apocalyptic number.

22145311224 is a gapful number since it is divisible by the number (24) 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 22145311224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32766063300).

22145311224 is an abundant number, since it is smaller than the sum of its proper divisors (43386815376).

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

22145311224 is a wasteful number, since it uses less digits than its factorization.

22145311224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199896 (or 199877 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

Adding to 22145311224 its reverse (42211354122), we get a palindrome (64356665346).

The spelling of 22145311224 in words is "twenty-two billion, one hundred forty-five million, three hundred eleven thousand, two hundred twenty-four".