513212111 has 2 divisors, whose sum is σ = 513212112. Its totient is φ = 513212110.

The previous prime is 513212081. The next prime is 513212113. The reversal of 513212111 is 111212315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513212111 is a prime.

Together with 513212113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 513212111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256606055 + 256606056.

It is an arithmetic number, because the mean of its divisors is an integer number (256606056).

Almost surely, 2^513212111 is an apocalyptic number.

513212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

513212111 is an equidigital number, since it uses as much as digits as its factorization.

513212111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 17.

The square root of 513212111 is about 22654.1852866087. The cubic root of 513212111 is about 800.6308102798.

Adding to 513212111 its reverse (111212315), we get a palindrome (624424426).

The spelling of 513212111 in words is "five hundred thirteen million, two hundred twelve thousand, one hundred eleven".