2311313231 has 4 divisors (see below), whose sum is σ = 2311466592. Its totient is φ = 2311159872.

The previous prime is 2311313203. The next prime is 2311313237. The reversal of 2311313231 is 1323131132.

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

It is a cyclic number.

It is not a de Polignac number, because 2311313231 - 2¹⁴ = 2311296847 is a prime.

It is a super-2 number, since 2×2311313231² = 10684337703591318722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311313237) 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, 51266 + ... + 85151.

It is an arithmetic number, because the mean of its divisors is an integer number (577866648).

Almost surely, 2^2311313231 is an apocalyptic number.

2311313231 is a deficient number, since it is larger than the sum of its proper divisors (153361).

2311313231 is a wasteful number, since it uses less digits than its factorization.

2311313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153360.

The product of its digits is 324, while the sum is 20.

The square root of 2311313231 is about 48076.1191341398. The cubic root of 2311313231 is about 1322.1668632256.

Adding to 2311313231 its reverse (1323131132), we get a palindrome (3634444363).

The spelling of 2311313231 in words is "two billion, three hundred eleven million, three hundred thirteen thousand, two hundred thirty-one".