2313211555 has 4 divisors (see below), whose sum is σ = 2775853872. Its totient is φ = 1850569240.

The previous prime is 2313211543. The next prime is 2313211559. The reversal of 2313211555 is 5551123132.

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

It is not a de Polignac number, because 2313211555 - 2¹³ = 2313203363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2313211559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231321151 + ... + 231321160.

It is an arithmetic number, because the mean of its divisors is an integer number (693963468).

Almost surely, 2^2313211555 is an apocalyptic number.

2313211555 is a deficient number, since it is larger than the sum of its proper divisors (462642317).

2313211555 is an equidigital number, since it uses as much as digits as its factorization.

2313211555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462642316.

The product of its digits is 4500, while the sum is 28.

The square root of 2313211555 is about 48095.8579817431. The cubic root of 2313211555 is about 1322.5287374804.

Adding to 2313211555 its reverse (5551123132), we get a palindrome (7864334687).

The spelling of 2313211555 in words is "two billion, three hundred thirteen million, two hundred eleven thousand, five hundred fifty-five".