511135423 has 2 divisors, whose sum is σ = 511135424. Its totient is φ = 511135422.

The previous prime is 511135421. The next prime is 511135433. The reversal of 511135423 is 324531115.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 511135423 - 2¹ = 511135421 is a prime.

It is a super-2 number, since 2×511135423² = 522518841290777858, which contains 22 as substring.

Together with 511135421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511135421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255567711 + 255567712.

It is an arithmetic number, because the mean of its divisors is an integer number (255567712).

Almost surely, 2^511135423 is an apocalyptic number.

511135423 is a deficient number, since it is larger than the sum of its proper divisors (1).

511135423 is an equidigital number, since it uses as much as digits as its factorization.

511135423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 511135423 is about 22608.3042928920. The cubic root of 511135423 is about 799.5494457779.

Adding to 511135423 its reverse (324531115), we get a palindrome (835666538).

The spelling of 511135423 in words is "five hundred eleven million, one hundred thirty-five thousand, four hundred twenty-three".