22147151 has 4 divisors (see below), whose sum is σ = 23850792. Its totient is φ = 20443512.

The previous prime is 22147129. The next prime is 22147157. The reversal of 22147151 is 15174122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22147151 - 2¹⁰ = 22146127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22147157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851801 + ... + 851826.

It is an arithmetic number, because the mean of its divisors is an integer number (5962698).

Almost surely, 2^22147151 is an apocalyptic number.

22147151 is a deficient number, since it is larger than the sum of its proper divisors (1703641).

22147151 is a wasteful number, since it uses less digits than its factorization.

22147151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703640.

The product of its digits is 560, while the sum is 23.

The square root of 22147151 is about 4706.0759662377. The cubic root of 22147151 is about 280.8272769922.

The spelling of 22147151 in words is "twenty-two million, one hundred forty-seven thousand, one hundred fifty-one".