1331228207 has 2 divisors, whose sum is σ = 1331228208. Its totient is φ = 1331228206.

The previous prime is 1331228183. The next prime is 1331228233. The reversal of 1331228207 is 7028221331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331228207 - 2¹⁴ = 1331211823 is a prime.

It is a super-2 number, since 2×1331228207² = 3544337078224869698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331228207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331228237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665614103 + 665614104.

It is an arithmetic number, because the mean of its divisors is an integer number (665614104).

Almost surely, 2^1331228207 is an apocalyptic number.

1331228207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331228207 is an equidigital number, since it uses as much as digits as its factorization.

1331228207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1331228207 is about 36486.0001507428. Note that the first 3 decimals coincide. The cubic root of 1331228207 is about 1100.0628633495.

Adding to 1331228207 its reverse (7028221331), we get a palindrome (8359449538).

The spelling of 1331228207 in words is "one billion, three hundred thirty-one million, two hundred twenty-eight thousand, two hundred seven".