513211123 has 2 divisors, whose sum is σ = 513211124. Its totient is φ = 513211122.

The previous prime is 513211091. The next prime is 513211129. The reversal of 513211123 is 321112315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513211123 - 2⁵ = 513211091 is a prime.

It is a super-2 number, since 2×513211123² = 526771313541842258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 513211123.

It is not a weakly prime, because it can be changed into another prime (513211129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256605561 + 256605562.

It is an arithmetic number, because the mean of its divisors is an integer number (256605562).

Almost surely, 2^513211123 is an apocalyptic number.

513211123 is a deficient number, since it is larger than the sum of its proper divisors (1).

513211123 is an equidigital number, since it uses as much as digits as its factorization.

513211123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 513211123 is about 22654.1634804731. The cubic root of 513211123 is about 800.6302965066.

Adding to 513211123 its reverse (321112315), we get a palindrome (834323438).

The spelling of 513211123 in words is "five hundred thirteen million, two hundred eleven thousand, one hundred twenty-three".