22021154 has 16 divisors (see below), whose sum is σ = 35168256. Its totient is φ = 10305600.

The previous prime is 22021151. The next prime is 22021159. The reversal of 22021154 is 45112022.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (22021151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4799 + ... + 8189.

It is an arithmetic number, because the mean of its divisors is an integer number (2198016).

Almost surely, 2^22021154 is an apocalyptic number.

22021154 is a deficient number, since it is larger than the sum of its proper divisors (13147102).

22021154 is a wasteful number, since it uses less digits than its factorization.

22021154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 22021154 is about 4692.6702419838. The cubic root of 22021154 is about 280.2937139016.

Adding to 22021154 its reverse (45112022), we get a palindrome (67133176).

The spelling of 22021154 in words is "twenty-two million, twenty-one thousand, one hundred fifty-four".