2231029991 has 2 divisors, whose sum is σ = 2231029992. Its totient is φ = 2231029990.

The previous prime is 2231029963. The next prime is 2231030023. The reversal of 2231029991 is 1999201322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2231029991 - 2²² = 2226835687 is a prime.

It is a super-3 number, since 3×2231029991³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231029961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115514995 + 1115514996.

It is an arithmetic number, because the mean of its divisors is an integer number (1115514996).

Almost surely, 2^2231029991 is an apocalyptic number.

2231029991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231029991 is an equidigital number, since it uses as much as digits as its factorization.

2231029991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 2231029991 is about 47233.7801896058. The cubic root of 2231029991 is about 1306.6776700694.

The spelling of 2231029991 in words is "two billion, two hundred thirty-one million, twenty-nine thousand, nine hundred ninety-one".