1222843281 has 16 divisors (see below), whose sum is σ = 1781669568. Its totient is φ = 739872000.

The previous prime is 1222843273. The next prime is 1222843289. The reversal of 1222843281 is 1823482221.

It is an interprime number because it is at equal distance from previous prime (1222843273) and next prime (1222843289).

It is not a de Polignac number, because 1222843281 - 2³ = 1222843273 is a prime.

It is a super-2 number, since 2×1222843281² = 2990691379773689922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1222843289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10996 + ... + 50661.

It is an arithmetic number, because the mean of its divisors is an integer number (111354348).

Almost surely, 2^1222843281 is an apocalyptic number.

1222843281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222843281 is a deficient number, since it is larger than the sum of its proper divisors (558826287).

1222843281 is a wasteful number, since it uses less digits than its factorization.

1222843281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62272.

The product of its digits is 12288, while the sum is 33.

The square root of 1222843281 is about 34969.1761555802. The cubic root of 1222843281 is about 1069.3591763650.

The spelling of 1222843281 in words is "one billion, two hundred twenty-two million, eight hundred forty-three thousand, two hundred eighty-one".