11630831281 has 2 divisors, whose sum is σ = 11630831282. Its totient is φ = 11630831280.

The previous prime is 11630831249. The next prime is 11630831287. The reversal of 11630831281 is 18213803611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7276943025 + 4353888256 = 85305^2 + 65984^2 .

It is a cyclic number.

It is not a de Polignac number, because 11630831281 - 2⁵ = 11630831249 is a prime.

It is a super-2 number, since 2×11630831281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11630831287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5815415640 + 5815415641.

It is an arithmetic number, because the mean of its divisors is an integer number (5815415641).

Almost surely, 2^11630831281 is an apocalyptic number.

It is an amenable number.

11630831281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11630831281 is an equidigital number, since it uses as much as digits as its factorization.

11630831281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 11630831281 in words is "eleven billion, six hundred thirty million, eight hundred thirty-one thousand, two hundred eighty-one".