311213323 has 2 divisors, whose sum is σ = 311213324. Its totient is φ = 311213322.

The previous prime is 311213257. The next prime is 311213341. The reversal of 311213323 is 323312113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311213323 - 2¹³ = 311205131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311213323.

It is not a weakly prime, because it can be changed into another prime (311210323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155606661 + 155606662.

It is an arithmetic number, because the mean of its divisors is an integer number (155606662).

Almost surely, 2^311213323 is an apocalyptic number.

311213323 is a deficient number, since it is larger than the sum of its proper divisors (1).

311213323 is an equidigital number, since it uses as much as digits as its factorization.

311213323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 19.

The square root of 311213323 is about 17641.2392705275. The cubic root of 311213323 is about 677.6717686503.

Adding to 311213323 its reverse (323312113), we get a palindrome (634525436).

The spelling of 311213323 in words is "three hundred eleven million, two hundred thirteen thousand, three hundred twenty-three".