212331313 has 2 divisors, whose sum is σ = 212331314. Its totient is φ = 212331312.

The previous prime is 212331293. The next prime is 212331323. The reversal of 212331313 is 313133212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199572129 + 12759184 = 14127^2 + 3572^2 .

It is a cyclic number.

It is not a de Polignac number, because 212331313 - 2²¹ = 210234161 is a prime.

It is not a weakly prime, because it can be changed into another prime (212331323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106165656 + 106165657.

It is an arithmetic number, because the mean of its divisors is an integer number (106165657).

Almost surely, 2^212331313 is an apocalyptic number.

It is an amenable number.

212331313 is a deficient number, since it is larger than the sum of its proper divisors (1).

212331313 is an equidigital number, since it uses as much as digits as its factorization.

212331313 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 212331313 is about 14571.5926720452. The cubic root of 212331313 is about 596.5836521247.

Adding to 212331313 its reverse (313133212), we get a palindrome (525464525).

The spelling of 212331313 in words is "two hundred twelve million, three hundred thirty-one thousand, three hundred thirteen".