22151553 has 8 divisors (see below), whose sum is σ = 30819648. Its totient is φ = 14125584.

The previous prime is 22151551. The next prime is 22151573. The reversal of 22151553 is 35515122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22151553 - 2¹ = 22151551 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22151551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160450 + ... + 160587.

It is an arithmetic number, because the mean of its divisors is an integer number (3852456).

Almost surely, 2^22151553 is an apocalyptic number.

22151553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

22151553 is a deficient number, since it is larger than the sum of its proper divisors (8668095).

22151553 is a wasteful number, since it uses less digits than its factorization.

22151553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321063.

The product of its digits is 1500, while the sum is 24.

The square root of 22151553 is about 4706.5436362579. The cubic root of 22151553 is about 280.8458816392.

Adding to 22151553 its reverse (35515122), we get a palindrome (57666675).

The spelling of 22151553 in words is "twenty-two million, one hundred fifty-one thousand, five hundred fifty-three".