2311356605 has 4 divisors (see below), whose sum is σ = 2773627932. Its totient is φ = 1849085280.

The previous prime is 2311356599. The next prime is 2311356617. The reversal of 2311356605 is 5066531132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1415791129 + 895565476 = 37627^2 + 29926^2 .

It is not a de Polignac number, because 2311356605 - 2¹⁶ = 2311291069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231135656 + ... + 231135665.

It is an arithmetic number, because the mean of its divisors is an integer number (693406983).

Almost surely, 2^2311356605 is an apocalyptic number.

It is an amenable number.

2311356605 is a deficient number, since it is larger than the sum of its proper divisors (462271327).

2311356605 is an equidigital number, since it uses as much as digits as its factorization.

2311356605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462271326.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 2311356605 is about 48076.5702291667. The cubic root of 2311356605 is about 1322.1751337485.

Adding to 2311356605 its reverse (5066531132), we get a palindrome (7377887737).

The spelling of 2311356605 in words is "two billion, three hundred eleven million, three hundred fifty-six thousand, six hundred five".