22154140 has 24 divisors (see below), whose sum is σ = 46685520. Its totient is φ = 8830848.

The previous prime is 22154137. The next prime is 22154177. The reversal of 22154140 is 4145122.

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 7 ways as a sum of consecutive naturals, for example, 4491 + ... + 8029.

It is an arithmetic number, because the mean of its divisors is an integer number (1945230).

Almost surely, 2^22154140 is an apocalyptic number.

22154140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22154140 is an abundant number, since it is smaller than the sum of its proper divisors (24531380).

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

22154140 is a wasteful number, since it uses less digits than its factorization.

22154140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 22154140 is about 4706.8184583644. The cubic root of 22154140 is about 280.8568142062.

Adding to 22154140 its reverse (4145122), we get a palindrome (26299262).

The spelling of 22154140 in words is "twenty-two million, one hundred fifty-four thousand, one hundred forty".