22145136 has 80 divisors (see below), whose sum is σ = 64329216. Its totient is φ = 6513408.

The previous prime is 22145111. The next prime is 22145141. The reversal of 22145136 is 63154122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13581 + ... + 15123.

Almost surely, 2^22145136 is an apocalyptic number.

22145136 is a gapful number since it is divisible by the number (26) 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 22145136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32164608).

22145136 is an abundant number, since it is smaller than the sum of its proper divisors (42184080).

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

22145136 is a wasteful number, since it uses less digits than its factorization.

22145136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590 (or 1584 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 22145136 is about 4705.8618764260. The cubic root of 22145136 is about 280.8187599580.

Adding to 22145136 its reverse (63154122), we get a palindrome (85299258).

The spelling of 22145136 in words is "twenty-two million, one hundred forty-five thousand, one hundred thirty-six".