1228941533 has 2 divisors, whose sum is σ = 1228941534. Its totient is φ = 1228941532.

The previous prime is 1228941529. The next prime is 1228941583. The reversal of 1228941533 is 3351498221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 670706404 + 558235129 = 25898^2 + 23627^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228941533 - 2² = 1228941529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228941583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614470766 + 614470767.

It is an arithmetic number, because the mean of its divisors is an integer number (614470767).

Almost surely, 2^1228941533 is an apocalyptic number.

It is an amenable number.

1228941533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228941533 is an equidigital number, since it uses as much as digits as its factorization.

1228941533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 1228941533 is about 35056.2623934726. The cubic root of 1228941533 is about 1071.1338413191.

The spelling of 1228941533 in words is "one billion, two hundred twenty-eight million, nine hundred forty-one thousand, five hundred thirty-three".