2291238609 has 16 divisors (see below), whose sum is σ = 3356693760. Its totient is φ = 1378636560.

The previous prime is 2291238589. The next prime is 2291238643. The reversal of 2291238609 is 9068321922.

It is not a de Polignac number, because 2291238609 - 2²⁷ = 2157020881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2291231609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245167 + ... + 254340.

It is an arithmetic number, because the mean of its divisors is an integer number (209793360).

Almost surely, 2^2291238609 is an apocalyptic number.

It is an amenable number.

2291238609 is a deficient number, since it is larger than the sum of its proper divisors (1065455151).

2291238609 is a wasteful number, since it uses less digits than its factorization.

2291238609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499660.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 2291238609 is about 47866.8842625045. The cubic root of 2291238609 is about 1318.3278890598.

It can be divided in two parts, 229123 and 8609, that added together give a palindrome (237732).

The spelling of 2291238609 in words is "two billion, two hundred ninety-one million, two hundred thirty-eight thousand, six hundred nine".