22147871 has 2 divisors, whose sum is σ = 22147872. Its totient is φ = 22147870.

The previous prime is 22147861. The next prime is 22147877. The reversal of 22147871 is 17874122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22147871 is a prime.

It is a super-3 number, since 3×22147871³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22147877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11073935 + 11073936.

It is an arithmetic number, because the mean of its divisors is an integer number (11073936).

Almost surely, 2^22147871 is an apocalyptic number.

22147871 is a deficient number, since it is larger than the sum of its proper divisors (1).

22147871 is an equidigital number, since it uses as much as digits as its factorization.

22147871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 32.

The square root of 22147871 is about 4706.1524624687. The cubic root of 22147871 is about 280.8303201744.

The spelling of 22147871 in words is "twenty-two million, one hundred forty-seven thousand, eight hundred seventy-one".