1228824281 has 2 divisors, whose sum is σ = 1228824282. Its totient is φ = 1228824280.

The previous prime is 1228824269. The next prime is 1228824293. The reversal of 1228824281 is 1824288221.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1228824269) and next prime (1228824293).

It can be written as a sum of positive squares in only one way, i.e., 1160083600 + 68740681 = 34060^2 + 8291^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228824281 - 2²² = 1224629977 is a prime.

It is a super-2 number, since 2×1228824281² = 3020018227150333922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1228824581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614412140 + 614412141.

It is an arithmetic number, because the mean of its divisors is an integer number (614412141).

Almost surely, 2^1228824281 is an apocalyptic number.

It is an amenable number.

1228824281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228824281 is an equidigital number, since it uses as much as digits as its factorization.

1228824281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32768, while the sum is 38.

The square root of 1228824281 is about 35054.5900132921. The cubic root of 1228824281 is about 1071.0997749902.

The spelling of 1228824281 in words is "one billion, two hundred twenty-eight million, eight hundred twenty-four thousand, two hundred eighty-one".