2291127291 has 12 divisors (see below), whose sum is σ = 3312913032. Its totient is φ = 1525799616.

The previous prime is 2291127287. The next prime is 2291127317. The reversal of 2291127291 is 1927211922.

It is a happy number.

It is not a de Polignac number, because 2291127291 - 2² = 2291127287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2291127211) 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 in 11 ways as a sum of consecutive naturals, for example, 125886 + ... + 142931.

It is an arithmetic number, because the mean of its divisors is an integer number (276076086).

Almost surely, 2^2291127291 is an apocalyptic number.

2291127291 is a deficient number, since it is larger than the sum of its proper divisors (1021785741).

2291127291 is a wasteful number, since it uses less digits than its factorization.

2291127291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269770 (or 269767 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 2291127291 is about 47865.7214611877. The cubic root of 2291127291 is about 1318.3065387444.

The spelling of 2291127291 in words is "two billion, two hundred ninety-one million, one hundred twenty-seven thousand, two hundred ninety-one".